eschenbach-optik-america-inc
Results: 54
Nu Vision Head-Mounted Video Magnifier
The Nu Vision Head-Mounted Video Magnifier is a video magnifier designed for use by individuals with low vision. The magnifier is worn like a pair of glasses with head straps and projects an enlarged image onto two liquid crystal display (LCD) screens in front of the eyes. It can also be worn over top of a pair of regular glasses or connected to a television, computer, digital camera, or other electronic device. It magnifies up to five times at optical infinity and up to 10 times at reading dist
Videolupe (Model 1657-104)
The Videolupe, model 1657-104, is a combination video magnifier and optical stand magnifier with light designed for use by individuals who have low vision. The magnifying lens provides 3X (7.6 diopter) magnification and the video magnifier provides magnification from 9X to 17.5X. The video magnifier can be connected to any television. No focusing is required. Objects are illuminated with a light emitting diode (LED) which provides unlimited bulb life. The choice of magnifying options makes it ea
Elg Television Reader (Model 1651-04)
The ELG Television Reader, model 1651-04, is a closed circuit television (CCTV) system designed for use by individuals with low vision. It consists of an adjustable camera unit set over a moveable table surface on which objects are placed for viewing on a television (not included). The CCTV connects to any television and provides up to 65 times magnification, depending on the size of the television used. Images can be viewed with enhanced contrast or in reverse polarity. The CCTV can be used to
Eschenbach Table Clamp (Model 1600)
The Eschenbach Table Clamp, model 1600, is a gooseneck holder designed for use by individuals with low vision. This table clamp can turn any hand-held magnifier into a hands-free magnifier, or it can be used to position smaller objects for easier viewing. The unit has a flexible metal, gooseneck arm with 2 clamps made from high quality black plastic with sponge rubber disks for firm contact on smooth surfaces.
Illuminated Pocket Magnifiers (Model Series 1510 & 1570)
Illuminated Pocket Magnifiers, model series 1510 and 1570, are hand held magnifying lenses with lights for individuals who have low vision. Ideal for use in the home, at work or at the store. The Mobilux 1510 Series has a newly designed aspheric lens with Duplex coating that provides superior optics. The magnification changes according to model and lens size and are as follows: 3.5x, 4x, 5x, 7x and 10x. The 1571-04 (mag. 6x) and 1573-04 (mag. 2.5x) are biconvex lens while 1572-04 (mag. 4x) and 1
System Vario - Illuminated Stand Magnifiers
The System Vario is an illuminated stand magnifier that can be put together in any combination to suit the needs of individuals who have difficulty seeing. System-Vario magnifiers are available with three types of illuminated handles that can be fitted with interchangeable magnification heads. The Incandescent Battery Handle, model 1540, is portable and best used for quick reading tasks because the batteries will only last eight hours. The halogen Battery Handle, model 1591-04, is ideal for thos
Highlighter (Model 1588-04)
The Highlighter, model 1588-04, is an illuminated stand magnifier designed with a highlighted orientation line for individuals with low vision. The entire magnification is illuminated, but one line of print is brighter. Because readers do not have to concentrate on orientation, they can read more easily and quickly. Lowering the illumination with the rheostat allows users to make the orientation line more visable by dimming the surrounding field. There is a power supply light to signify when pow
Super-Lite (Model 2090-04)
The Super-Lite is an illumination system for large field and rectangular magnifying vision aids for individuals who have difficulty seeing. The illuminated handle provides fluorescent light that lasts up to 2,000 hours. It comes with four different sized clamps so that it can be attached to various sized lenses. OPTIONS: Additional bulbs are sold for $9.90 a piece. WARRANTY: One year limited except on bulbs.
Visomax (Model 2083-04, 2084-04 & 2085-04)
The Visomax, models 2083-04, 2084-04, and 2085-04, is a magnifying lens on a stand with a light for individuals who have trouble seeing. The combination features a large field stand magnifier and the Super Lite (see separate entry). Maximum magnification and object distance permits easy working beneath a large field lens which may be turned by 360 degrees to any reading position. There is a choice of three lenses. The lenses are Aspheric, PXM lightweight lens with Duplex coating and magnificatio
Vario-Max Magnifier (Model 2782-104)
The Vario-Max Magnifier, model 2782-104, is double arm illuminated magnifier designed for indiviuals who have difficulty seeing. The strong, double arm provides flexibility suitable for any task. The arm is made of stable folding arm with covered springs and interneal power supply, two conveniently shaped locking screws. The base is a clamp that fits table tops up to 60 mm thick. The bulb is fluorescent and housed in a new design with a detachable handle. OPTIONS: The magnifying lens are not in
Vario Magnifier (Model 2778-104)
The Vario Magnifier is a magnifying lens on a stand with a light for individuals with low vision. It offers Super-Lite illumination to provide optimum, shadowless illumination with low heat output. The stand has a sturdy spring tension double arm and a clamp that fits table tops up to 60 mm thick. POWER: Plugs into standard AC wall outlet. OPTIONS: Choice of three lens not included: Biconvex, model 2778-01, 2x, 120 mm, $51.75; Aspheric, model 2779-01, 3x, 75x100 mm, $48.40; Aspheric, model 2780-
Lamp Magnifier With Integrated Lens (Model 2773-04)
The Lamp Magnifier with Integrated Lens is a magnifying lens on a stand with a light for individuals with low vision. The lens is Biconvex, PXM integrated lens that magnifies 2x. The illumination is incandescent, 60 W, 110 V candelabra bulb that is included. The stand has a sturdy, spring tension, double arm and a clamp that fits table tops up to 60 mm thick. DIMENSIONS: Lens is 100 mm. Cord is approximately two meters long. WARRANTY: One year limited, does not cover bulb.
Table Top Magnifier Lamp (Model 2776-04)
The Table Top Lamp Magnifier, model 2776-04, is a magnifying lens on a stand with a light for individuals with low vision. It has a Biconvex, PXM integrated lens that magnifies 2x, and Super-Lite illumination using an energy saving fluorescent bulb. The stand has a sturdy round base and a gooseneck flexible arm. OPTIONS: Additional bulbs cost $9.90. DIMENSIONS: Lens is 100 mm and cord is approximately two meters long. WARRANTY: One year limited.
Mediplan (Model Series 2666)
Mediplan, model series 2666, are hand held magnifying lenses designed to be lightweight and portable for individuals who have low vision. The aplanatic lens is made of high-quality PXM lightweight lens with two plano-convex lenses that give a clearly defined, distortion free image. It is designed specifically for individuals with macular degeneration because of the clear image at the edges. The high-tech ribbed handle is made of durable plastic. Models 2666-75 and -950 have a magnification of 3x
Aplanatic Hand Held Magnifiers (Model Series 2668-950)
The Aplanatic Hand-Held Magnifier, models 2668-50, 2668-75 & 2668-950, are hand-held magnifiers designed to be lightweight and portable for individuals with low vision. The Aplanatic lens is made of high-quality PXM lightweight lens with two plano-convex lenses that give a clearly defined, distortion free image. It is designed specifically for individuals with macular degeneration because of the clear image at the edges. All models are mounted in lightweight high grade plastic with ergonomic
Aspheric Hand Held Magnifiers (Model Series 2655)
Aspheric Hand Held Magnifiers, model series 2655, designed to be lightweight and portable for individuals who have low vision. The aspheric lens is made of high-quality PXM lightweight lens with Duplex coating. It has aspheric curves which allow for higher magnification with less distortion. The magnifier, developed with ergonomic and practical considerations, was specially calculated to provide distortion free viewing. It is mounted in a matte plastic with a handle that is also matte plastic. T
Biconvex Master Series (Model 2320 Series)
The Biconvex Master Series, model series 2320, is a collection of handheld magnifiers with a biconvex lens for individuals who have low vision. The magnifier is made with a Biconvex PXM lightweight lens with Duplex coating. The biconvex lens is the most commonly used in large field, low power magnifiers and is distinguished by its two spherical surfaces. Both radii add together thus forming the refractive power. The lenses are mounted in lightweight metal which is highly polished finished in eit
Biconvex Large Field Series (Model Series 2642)
The Biconvex Large Field Series, model series 2642, is a collection of various handheld magnifiers designed to be lightweight and portable for individuals with low vision. The lens is a large field Biconvex PXM lightweight lens with a Duplex coating mounted in transparent PXM plastic to prevent shadowing effects. All the magnifiers feature a 5x plano-convex bifocallens in the handle for fine details. The ergonomically designed handle is made of black plastic with a slot for attaching a carrying
Biconvex Inexpensive Hand Held Magnifiers (Model Series 2612)
The Biconvex Inexpensive Hand Held Magnifiers, model series 2612, is a collection of various handheld magnifiers designed to be completely transparent for maximum light and shadow free viewing for individuals with low vision. The lens is a Biconvex PXM lightweight lens with a Duplex coating mounted in transparent PXM plastic to prevent shadowing effects. All the magnifiers feature a 5x plano-convex bifocal lens in the handle for fine details. The ergonomically designed handle is made of clear pl
Maxi-Plus (Model 2678)
The Maxi-Plus, model 2678, is magnifying lens with a neck strap designed to free hands for work and hobbies for individuals with low vision. Around the neck magnifiers are for tasks that require two hands sucha s sewing, knitting or other hobbies. The lens is a Bi-aspheric PXM lightweight lens with Duplex coating for near distortion-free viewing that magnifies 2x. A smaller bifocal lens is also Bi-aspheric but magnifies 4x. It is mounted in transparent PXM for shadow free viewing. An adjustable
Around-The-Neck-Magnifier (Model 2677)
The Around-The-Neck Magnifier, model 2677, is a magnifier designed for keeping hands free for work and hobbies for individuals with low vision. The lens is a Biconvex PXM lightweight lens mounted in transparent plastic to prevent shadowing effects. The magnification is 2x. The magnifier comes complete with a cord. DIMENSIONS: Lens is 100 mm in diameter. WARRANTY: One year limited.
Combination Hand/stand/pocket Magnifier (Model 2050)
The Combination Hand/Stand/Pocket Magnifier, model 2050, is an all-in-one magnifier for individuals with low vision. This magnifier can be used as a hand-held magnifier that fits into your pocket; a fixed stand magnifer to leave hands free; and an inclined magnifier that also stands hands free. The lens is an Aspheric PXM lightweight lens with Duplex coating that magnifies 3.5x. It is mounted in ABS plastic. OPTIONS: Drawstring pouch is available for $4.95. DIMENSIONS: 60 mm. WARRANTY: One year
Combination Hand/stand Magnifiers (Models 2031, 2032, 2034, & 2036)
The Combination Hand/Stand Magnifiers, models 2031, 2032, 2034 and 2036, are magnifiers with a versatile design for individuals who are visually disabled. The magnifier can be used as a standard hand-held magnifier. Or, unfold the legs and use it as a fixed stand magnifier. It also tilts to be used as an inclined stand magnifier. The legs and handle fold away so that it can be stored in a leather case that is included. Completely lightweight and portable. The lens is an Aspheric PXM lightweight
Elegant Magnifiers (Model Series 2360)
Elegant Magnifiers, model series 2364, is a hand held magnifier designed for individuals who have low vision. The lens is Biconvex PXM lightweight lens with Duplex coating with magnification ranging from 2x to 2.5x. They are mounted in a gold-plated light alloy with a choice of three handles: red-flamed lacquered with gold-plated endcap; greeen lacquered; and guenuine leather. DIMENSIONS: The lacquered handles have round lens with 80 mm diameter. Leather handle measures 100x50 mm. WARRANTY: One
Pendant Magnifiers (Models 2134 & 2135)
Pendanat Magnifiers, models 2134 and 2135, are magnifiers with a neck strap designed to be always within reach for individuals who have low vision. The lens is Biconvex, optical glass with a magnification of 3.5x. It is mounted in either Chrome or gold-plated material and has a matching chain. DIMENSIONS: The lens size is 35mm in diameter and chain is approximately 30 inches. WARRANTY: One year limited.
Folding Pocket Magnifiers (Model Series 1700)
The Folding Pocket Magnifiers are designed to be lightweight and portable for individuals who have low vision. The lenses are Biconvex, PXM lightweight lens with a magnification of 3.5x. Models 1740-130 and 1740-530 have a magnification of 6x. They are mounted in a transparent plastic and come in a variety of case styles. The Prestige Collection comes in fine leather cases lines for protection. The Trend Design comes with high-quality, velvety soft cases. The Classic Collection are classic grain
High Magnification Folding Pocket Magnifiers (Model Series 1710)
High Magnification Folding Pocket Magnifiers, model series 1710, are high power magnifiers in a compact size for individuals who have low vision. The lens and hard case is designed as a single unit to provide complete protection for the lens so it is always protected. The strong, fine grained, plastic case also acts as a sturdy handle. It is small and portable and comes complete with a carrying cord. The lens is an Aspheric PXM lightweight lens with anti-static coating. Masgnification ranges fro
High Power Stand Magnifiers (Models 2618, 2624, 2626 & 2616)
High Power Stand Magnifiers, models 2618, 2624, 2624 and 2616, are designed for individuals with low vision. Theses magnifiers are designed with a transparent plastic base to let in maximum light for clear, bright viewing mounted in a white plastic frame. They are ideal for any task that reqires high magnification and an open base allows for marking. The lens is an aspheric PXM lightweight lens with a Duplex coating with magnification ranging from 4x to 10x depending on model. Some models come w
Rectangular Stand Magnifiers (Models 2623, 2625 & 2622)
The Rectangular Stand Magnifiers, models 2623, 2625 and 2622, are magnifiers with a large field lens designed to permit binocular viewing for individuals with low vision. These magnifiers are ideal for reading newsprint. A transparent plastic base lets in maximum light for clear viewing. The base is open for marking and writing. The lens is an aspheric PXM lightweight lens with a Duplex coating and is mounted in a white plastic frame. Magnification ranges from 3x to 4x. Model 2622 may be turned
Bright Field Magnifiers (Models 1420 To 1422, 1425, 1435, 1436)
Bright Field magnifiers, models 1420, 1421, 1422, 1425, 1435 and 1436, are magnifiers designed to look like a paper weight for individuals who have low vision. They provide distortion free magnification and have calculated light guidance that directs all possible illumination onto the object. This provides a brighter field of view without an additional light source. The lenses for all models are made of optical quality glass and provide 2x magnification. The rims are matte edge except model 1421
Bar Magnifiers (Models 2605, 2606, & 2608)
The Bar Magnifiers are designed for use by individuals with low vision. Designed for reading computer printouts and other detail work, models 2605 and 2508 have a highlight line for reading over long periods. These magnifiers have plastic aspheric two-diopter lenses. Models 2605 and 2608 offer 1.5x magnification and model 2606 provides 2x magnification. OPTIONS: A leather case is available for model 2605. DIMENSIONS: model 2605 is 200 x 25 millimeters (mm), model 2606 is 250 x 35 mm, and model 2
Gooseneck Magnifiers (Models 2754-60 & 2754-680)
The Gooseneck Magnifiers, models 2754-60 and 2754-680, are magnifying lens with a stand for individuals with low vision. They have a metal base and an adjustable chrome plated metal tube. They are specifically designed for vision tasks that require hands to be free. Model 2754-60 is made with an Aplanatic PXM lightweight lens with Duplex coating and magnifies 4x. Model 2754-680 has a Biconvex PXM lens with Duplex coating and magnifies 2.5x. This model comes with a 5x bifocal lens. DIMENSIONS: Mo
Precision Folding Magnifiers
The Precision Folding Magnifiers are designed to provide high power optics for individuals with low vision. They are available in three types of lenses; Achromatic, Aplanatic, and Biconvex. The Achromatic lens system is unique in that it is free from extraneous colors. It consists of coated lenses that are cemented together using different types of glass. The Aplanatic lens is two plano-convex glass lenses combined to provide distortion free optics. Some of the magnifiers are mounted in a black
Precision Scale Magnifiers (Models 1154-7, 1154-10 & 1152-6)
Precision Scale Magnifiers are designed for use in fields of engineering, printing and medicine for individuals with low vision. They provide precise measurings with distortion-free optics. There is close focusing by using the focus arresting ring. The magnifier includes interchangeable measuring scales for different applications. The lens is eithe Achromatic or Aplanatic with magnification ranging from 6x to 10x. The body is made of fiberglass reinforced polyamide. OPTIONS: An illumination unit
Binocular & Monocular Galilean System For Distance (Models 1634 & 1635)
The Binocular Galilean System for Distance, model 1634, is a binocular magnifier for watching TV or a sporting event for individuals with low vision. They are small lightweight optical systems comprised of a positive objective lens and a negative ocular lens. The system is designed to provide a perfect fit with adjustable bars for the pupillary distance, cold bend tempels, and an adjustable bridge. The lens is Achromatic and has a magnification of 3x. They are mounted in a frame of black plastic
Binocular & Monocular Galilean System For Near (Models 1636 & 1637)
The Binocular Galilean System for Near, model 1636, is a binocular magnifier for near-sighted tasks that require free hands such as reading or detailed inspection work for individuals with low vision. They are small lightweight optical systems comprised of a positive objective lens and a negative ocular lens. The system is designed to provide a perfect fit with adjustable bars for the pupillary distance, cold bend tempels, and an adjustable bridge. The lens is Achromatic and has a magnification
Galilean Telescope System (Model 1621)
The Galilean Telescope System, model 1621, is a monocular lens designed for mounting in spectacles for individuals with low vision. This system has been calculated and designed to eliminate astigmatism of oblique incidence and distortion as well as to largely exclude chromatic aberration. The base magnification is 2.2x and the visual field is 14 degrees with a focus range of 250 to 100 meters. The lens is housed in black plastic. OPTIONS: Reading caps allow for near vision. Magnification of base
Keplerian Telescopes (Model Series 1672)
The Keplerian Telescope, models 1672-1, -2, -3 and -4, is a telescope designed for distance, intermediate and near use for individuals with low vision. The telescope can be used as a hand held spotting telescope or it can be mounted in frames for hands free tasks. The lens is Achromatic glass lens which is blue coated with integrated miniature roof-prism. It is housed in a matte-black-lacquered metal and comes with a soft black carrying case with Velcro fastener and carrying cord. Magnification
Direction Changing Prism For Keplerian Monoculars (Model 1690)
The Direction Changing Prism for Keplerian Monoculars, model 1690, is designed to provide a comfortable viewing position when using the monocular lens for individuals with low vision. The user is able to angle the monocular down and still see the image ahead. When this is used with the Keplerian monocular and a table top stand, a student is able to view the blackboard without having to refocus or change writing positions. OPTIONS: A table-top stand, model 1670-3, allows for a comfortable positio
Binocular & Monocular Clip On (Model Series 1642)
The Clip-on Systems, series 1642, are magnifying lenses for eyeglasses designed to provide spectacle wearers with hands free magnification for individuals with low vision. The clip is made of high grade plastic and has four rubber tips for the legs to protect the eyeglass lens and is designed to fit most eyeglass fromes. The lenses are available as monocular or binocular and are interchangeable. Magnification ranges from 2x to 7x. The lens is set two to three inches from the eye, allowing for a
Headband Magnifier (Model 1641)
The Headband Magnifer, model 1641, is a head bourne mounted aid designed is designed for those with low vision who do not where spectacles. They are ideal for any task that requires hands to be free such as reading, inspection, and detail work. When lense are not in use, they can be flipped up and out of the way. Magnification ranges from 2x to 3x and can be easily interchanged. The headband is made of high-grade plastic and the front portion is padded for comfort. OPTIONS: Replacement lenses co
Frame Mounted Magnifer (Model 1643)
The Frame Mounted Magnifer, model 164s, is a head bourne mounted aid designed for those with low vision who do not where spectacles. They are ideal for any task that requires hands to be free such as reading, inspection, and detail work. When lense are not in use, they can be flipped up and out of the way.Magnification ranges from 2x to 3x and can be easily interchanged. The frame is made of fiberglass reinforced plastic and has wire core temples. The bridge and temples are adjustable. OPTIONS:
Maxdetail Hands-Free Magnifying Glasses (Model 1624-5)
The MaxDetail Hands-Free Magnifying Glasses, model 1624-5, are magnifier glasses designed for use by individuals with low vision. These lenses provide 2X magnification and are worn like eyeglasses. They provide clear resolution of minute details for enhanced viewing of small-print materials or intricate hobbies. The glasses focus on near objects with a working distance of 16 inches, and can be adjusted so that each eye lens can be focused separately (±3 diopters). These lightweight lenses are ma
Maxevent Telescopic Glasses (Model 1624-3)
MaxEvent Telescopic Glasses, model 1624-3, are binocular magnifiers designed for use by individuals with low vision. These hands-free, head-mounted glasses provide 2.1x magnification, and focus on objects from a distance of 10 feet to infinity. They can be used for viewing sports events, concerts, movies, theater, bird watching, or any other distance viewing activity where a magnified image would be helpful. The Galilean-type lenses are made of PXM material and have a mirrored coating to prevent
Scribolux (Model 1565-1)
Scribolux, model 1565-1, is an illuminated stand magnifier designed for use by individuals with low vision. This magnifier can be used for tasks such as writing checks or letters, doing crossword puzzles, or reading. It features a large open viewing area for reading and writing. The aspheric-type lens provides 2.8x (7 diopter) magnification. The lens has a scratch-resistant ceratec coating and comes with a protective cover. The magnifier operates with SMD-LED illumination. POWER: Uses four doubl
Makrolux Bright Field Magnifier (Model 1436-1)
The Makrolux Bright Field Magnifier, model 1436-1, is an illuminated magnifier designed for use by individuals with low vision. This magnifier provides 2.2x magnification that is distortion-free from edge to edge, and uniformly illuminated by a bright LED. The lens has a forward tilted angle that supports a comfortable reading position, and the width of the rectangular reading area covers the column width of many newspapers and magazines. Ridges on the bottom keep the aspheric lens one millimete
Microlux 6X18 (Model 4294-618)
Microlux 6x18, model 4294-618, is a monocular telescope designed for use by individuals with low vision. This portable monocular fits into a pocket or purse and can be used for museums, sporting events, bird watching, or reading far- away signs. It has a Keplerian lens that provides 6x magnification with a focal range of 10 feet to infinity and a visual field of 8 degrees. The lens material is coated achromatic glass, with plastic casing. One squeeze on the casing causes the monocular to open fo
Smartview Xtend
Smartview Xtend is a desktop video magnifier designed for use by individuals with low vision. There are four models: Basic Xtend, Module 1 Xtend, Module 2 Xtend, and Module 3 Xtend. All of the models have a color flatscreen display; magnification range from 3x to 68x depending on screen size; auto focus; brightness control; high contrast; LED illumination; and reverse polarity. Additional Module 1 Xtend features include lines and blinds, page locator, and magnification preset. Additional Module
Clip&read (Model 2916)
Clip&Read, model 2916, is a pair of magnifying glasses for cell phone screens, digital camera screens, and other small devices, designed for use by individuals with low vision. This miniature pair of reading glasses can be attached to any portable device, using either the attached clip or the included velcro fastenings. The glasses are lightweight and sit snugly on the sides of the user's temples without pressure points. Magnification levels are +1.5 and +2.5 diopters. The glasses come with
Mobilux Far Telescope And Maginifier
The Mobilux Far is a hand magnifying lens and pocket telescope designed for use by individuals with low vision. This device can be used for both distance and near tasks. Also when set as a telescope and used in reverse (looking through the objective lens), it can be used as a panoramic field expander. The objective lens in the unit features a refractive front surface and a diffractive rear surface. The combination design provides power and color correction in a single thin lens. As a magnifier,
Eschenbach Mobilux Illuminated Pocket Magnifer
The Eschenbach Mobilux Illuminated Pocket Magnifier is a folding pocket magnifier designed for use by individuals with low vision. The specially-designed hinge keeps the top and bottom sections together and eliminates alignment problems when closing the handle. The unit has a 38-diopter aspheric lens, replaceable incandescent bulb, large raised on/off switch, and an attached protective lens cover that can be removed. This magnifier offers 10x magnification. POWER: Uses 2 double-A batteries (incl
Eschenbach Mobilux 5X Illuminated Pocket Magnifer
The Eschenbach Mobilux Illuminated Pocket Magnifier is a folding pocket magnifier designed for use by individuals with low vision. The specially-designed hinge keeps the top and bottom sections together and eliminates alignment problems when closing the handle. The unit has a 20-diopter aspheric lens, replaceable incandescent bulb, large raised on/off switch, and an attached protective lens cover that can be removed. A storage compartment in the handle holds a spare bulb (included). This magnifi
MaxTv Clip
MaxTv Glasses
The MaxTVGlasses are hands-free, head-mounted glasses for users with low vision. The glasses provide 2.1x magnification and can be adjusted so that each eye lens can be focused separately [±3 diopters], making the system adaptable to most patients. The glasses will focus on objects from distances of 3 meters [10 feet] to infinity, and can be used for watching TV, sporting events, movies, theater, bird watching, or any other distance viewing activity in which a magnified image would be helpful.