Retina Orange County uses the Digisight SightBook app on iPhone, iPad, and iPod touch to help you monitor and follow changes in your vision and your disease.

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Practice ID: 153

Physician Last Name: Vaidya

Specialty: Retina

Overview

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The SightBook™ application available from the Apple App Store for your mobile device (iPhone, iPad, iPod) allows you to test your vision frequently and share your test results with your designated physician in real time. Once you have downloaded the app, you should join the DigiSight network so that your test results may be saved and shared. You can join from your app (simply use the “Join / Sign In” button on the splash screen) or from this website, via the Register page. Once you have joined, as long as you are signed in, the results of your vision testing are saved on your mobile device and in your SightBook record, available to you on this website under the My DigiSight tab. To share these results with your designated physician, connect with a doctor using the application or from this website.

On this page, we describe the vision tests included in the SightBook™ application and the other functions of the application (reviewing your test results, logging treatments and appointments, and the functions under the Settings tab).

If you have questions, please contact info@digisight.net for more information.

Vision Tests

Test Menu

My Test Sequence

Test Sequence

Consult with your physician to determine the best test or series of tests to take to monitor your vision. On the Settings screen, you can turn ‘on’ these tests, so that selecting “My Test Sequence” from the Vision Test Menu will automatically take you through them. You can also select which eye (or both) will be tested.

Acuity

Acuity Test

Visual Acuity is a measure of the spatial resolution of your vision, and is one of the most important indicators of the status of your visual system. Changes in acuity may reflect processes affecting refraction of the eye, retinal function or the brain [Read More …].

The SightBook™ Visual Acuity Test will show you a letter in the upper panel, beginning in the middle of the sight range (20/70). Touch the corresponding letter in the bottom panel, or hit the “can’t see” button if you cannot identify the letter. The letter size will decrease after each correct response, or increase after an incorrect response. The test stops at the level where two correct responses have been obtained, with two incorrect responses obtained at one level smaller. Alternatively, the test stops when the minimum font size (20/20) has been identified correctly twice, or the maximum size fonts (20/400) have not been read correctly twice.

It is important to follow the test directions given on the first test screen of the App: hold the mobile device 14” (36cm) from your eyes. If you use glasses for reading wear them during the test. Keep only one eye open during each test. Make sure the screen is clean.

Watch the Acuity video …

Amsler Grid

Amsler

The Amsler Grid test is a diagnostic tool that aids in the detection of visual disturbances caused by changes in the retina, particularly the macula (e.g. macular degeneration, epiretinal membrane, retinal detachment), as well as the optic nerve and the brain. Since it detects image distortions and small variations in retinal sensitivity, it is useful in identifying the earliest symptoms of macular disease.

In the test, you look (with each eye separately) at the small red dot in the center of the grid. Touch the screen to mark any area where the lines appear wavy, dim or missing. The result is quantified as the relative area marked.

It is important to follow the test directions given on the first test screen of the App: hold the mobile device 14” (36cm) from your eyes. If you use glasses for reading wear them during the test. Keep only one eye open during each test. Make sure the screen is clean.

Watch the Amsler Grid video …

Low Light Acuity

Low Light Acuity Test

The Low Light Acuity Test assesses the difference in visual acuity at normal and at low light illumination conditions. In the first part of the test visual acuity is measured by progressively decreasing the size of the test letter on a white background. In the second part of the test the background becomes darker, and visual acuity is measured again.

Significant reduction in low light (mesopic) vision may be caused by a cataract or by changes in the retina and optic nerve.

Acuity + Contrast

Acuity plus Contrast

Contrast sensitivity is a measure of the ability to discern between luminences of different levels in a static image. Contrast sensitivity varies between individuals and changes with age, reaching a maximum at approximately 20 years of age. It also depends on spatial frequencies of the object, and reaches its maximum at about 2–5 cycles/degree. Contrast sensitivity can decline due to ocular diseases such as cataract and retinopathy.

This test first measures Visual Acuity at 100% contrast, and then measures contrast sensitivity with font size 2 lines above the Visual Acuity level. Due to the smaller font size used in this test, it is more challenging, and therefore may be more sensitive for detecting problems than the standard Contrast test alone.

Watch the Acuity + Contrast video …

Red-Blue Acuity

Red-Blue Acuity

The Color Visual Acuity test measures vision first with red letters and then with blue. Differences in visual acuity with these colors can be caused by cataract and changes in the retina and optic nerve.

Watch the Red-Blue Acuity video …

Inverse Acuity

Inverse Acuity

This test is similar to the standard Acuity Test, but uses white letters displayed on a black background instead of black letters displayed on a white background. The black background may help reduce glare from scattered light.

Watch the Inverse Acuity video …

Contrast

Contrast

Contrast is the difference in visual properties that make an object distinguishable from its background. In visual perception, contrast is determined by the difference in the color and brightness of the object and background within the field of view. Significant changes in contrast sensitivity may be caused by cataract and changes in the retina and optic nerve [Read More …].

This test measures contrast sensitivity in grey scale. In the test, the contrast of the displayed letters will vary (increase or decrease) based on the success of your response.

Watch the Contrast video …

Inverse Contrast

Inverse Contrast

This test is similar to the standard Contrast Sensitivity Test, but uses light letters displayed on a black background instead of dark letters displayed on a white background. The black background may help reduce glare from scattered light, but may also make the test more challenging due to the low luminance of the screen.

Watch the Inverse Contrast video …

Low Light Contrast

Low Light

Significant reduction in low light (mesopic) vision may be caused by changes in the retina and optic nerve. The Low Light Contrast test assesses contrast sensitivity at dim illumination conditions, simulating night vision. In this test, the background will become progressively darker until you are unable to recognize the letters.

Watch the Low Light video …

Test Results

Test Results

If you have joined the DigiSight Network (using the “Join / Sign In” button on your app), and are signed in when taking your vision tests, all of your test results will be saved in your mobile device and automatically uploaded to your SightBook record on the digisight.net website. You can see these results on your SightBook page on the web (under My DigiSight), and also under the second ‘tab’ of your app on your mobile device.

Logging Treatments

Treatments

For your convenience and the completeness of your SightBook record, you should log treatments that you have on the day you have them. The third ‘tab’ of your app lets you do just this. Select ‘Add’ to add a treatment, select the date from the spinner, the eye, and the treatment type. You can always ‘Edit’ and remove treatments if you make an error.

Your doctor can also add treatment data when he or she adds Office Visit Data to your record from the digisight.net website. Treatment data added by your doctor is shown in blue text to distinguish it from treatment data you add, and you cannot edit or delete this data.

Logging Appointments

Appointments

For your convenience, you can add reminders of upcoming appointments with your physician on the fourth ‘tab’ of the app. Note: this does not make an appointment with your physician, it simply reminds you of an appointment you have made with the office. Simply ‘Add’, select appointment date and time, and add the appointment. You can always ‘Edit’ and remove appointments if you make an error.

Settings

Settings

The fifth ‘tab’ of your app is the Settings screen. Here you can sign in and out, select the tests for your test sequence, select your test frequency, select which eye (or both) will be tested, set the result units for Visual Acuity testing, enable/disable voice prompting, or connect quickly with a physician.

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