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iChart 2000 is an application for the iPod Touch or iPhone designed to be used by eye care professionals. The application is designed to replace the plethora of near vision tests cards and boxes with one versatile and elegant solution. It also contains a wide selection of vision tests scaled for 3 metres which may be used for distance vision testing, a selection of images to help explain eye conditions to patients and a toolkit for helping with optics/vision related calculations.
“A huge range of vision tests in the palm of your hand”
“Brilliantly thought out and put together”
AVAILABLE FOR DOWNLOAD FROM THE ITUNES APP STORE.
Search for iChart2000 or Click HERE Only £44.99 Download IChart 2000 Manual
iChart2000 includes a huge range of tests and stimuli. These are categorized into four modes:
Near tests: A large selection of tests designed for assessing “near vision”. The iPod or iPhone is held at a typical reading distance (e.g. 40cm) for these tests.
- 3m tests : A range of tests and stimuli designed to be viewed from 3 metres. These may be used within the consulting room or for domiciliary testing.
- Patient information: A selection of images and a video to help explain various eye conditions to patients.
- Toolkit: This contains a number of calculators to help with optics and vision related calculations
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NEAR TESTS
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There are nine groups of near vision tests.
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Reading tests: This group displays conventional reading test types calibrated in point size (N5, N6, N8 etc.) where the point size refers to the height of the body of the letters in units of 1/72 of an inch.
By rotating the iPod/iPhone passages of text suitable for children and adults can be displayed. Text size is changed by simply stroking the screen.
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Near LogMAR reading charts: At last - a sensible way to measure near visual acuity. Rows of text are arranged according to the logMAR format.
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Near LogMAR chart: Selecting this option displays logMAR charts scaled for viewing at 100cm. The size of the letters is shown in LogMAR units in the left column and Snellen format in the right column.
Rotating the iPod/iPhone displays logMAR charts with a variety of optotypes including British, Sloan oand tumbling E.
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Near task simulator: One of the purposes of near vision testing is to ensure that a patient has adequate vision to perform everyday tasks such as reading a newspaper, yellow pages, maps etc.
iChart 2000 contains a selection of such images. The magnification of these images can be adjusted by tapping the screen and selecting “Pan and zoom” from the menu. The image can then be moved around by simply moving your finger over the screen. The magnification can be changed by moving two fingers together or apart while touching the screen.
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Fixation disparity: Assess horizontal and vertical fixation disparity using the red/green visor supplied.
Unique test design provides excellent stimulus for accommodation and binocular lock.
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Binocularity: The Binocularity test is designed to assess the ability of the brain to integrate information from both eyes. The first two letters are seen by the right eye (assuming the red filter is in front of the right eye), the middle letter is seen by both eyes and the last two letters are seen by the left eye.
The patient is asked to read the letters. Patients with good binocularity will read the complete words. If a patient reads CHA it implies that they are suppressing the left eye while reading AIN suggests that they are suppressing the right eye. Some grading of binocular status is possible by recording the smallest word that can be read completely.
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Stereopsis: A series of random dot stereogram are included to assess stereopsis.
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Amsler chart: The Amsler grid is designed to detect subtle disturbances within the centre of the visual field and is particularly useful for patients with macula degeneration. A variety of grids are displayed to test different aspects of visual function.
Rotating the iPod/iPhone changes the format of the grids. The patient can draw directly on the grid and the resultant image can be emailed to a computer to be printed.
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Near duochrome test: A variety of images can be displayed against a duochrome (red/green) background. This can be used to assess accommodative lag/lead in younger patients and to fine-tune presbyopic corrections for older patients.
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Near fixation: A series of images are included for the patient to fixate on while the optometrist is performing various tests, for example a cover test.
The images (letters, crosses, cartoon characters) can be made to change automatically to form a slideshow by tapping on the screen and selecting “Slideshow” from the menu. The timing and transition between images can be changde from the main Settings menu.
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