Neovascularization is the term applied to growth of errant blood vessels into the retina. This can occur whenever the retina is compromised by diseases such as age-related macular degeneration, myopic degeneration, or diabetic macular edema. Neovascularization is initially identified during dilated eye examinations, the scheduling of which depends upon the patient’s initiative in acquiring and maintaining regular appointments with a retinal specialist. Early detection is vital to prevention of quick vision loss—often within days or weeks—so awareness and fast action are necessary to receive effective treatment with anti-VEGF drug injections and/or laser coagulation.
Self-monitoring is playing an important role in successful management of eye health. Several tests and devices are available to people who are at risk for neovascularization and would like to track their own conditions between regular eye exams. These are listed here with links to the tests and more information:
- Amsler grid (Marc Amsler)
https://lowvision.preventblindness.org/2013/07/12/amsler-grid/- The user identifies apparent distortion or other disturbances while viewing a printed grid
- ForeSee Home (Notal Vision Inc.: Tel Aviv, Israel)https://lowvision.preventblindness.org/2010/01/28/foresee-home-sets-new-standard-of-care-for-amd-patients/
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- Incorporating the principle of preferential hyperacuity perimetry (PHP), aka Vernier acuity, the user detects apparent misalignment of a series of dots, suggesting fluid accumulation in the retina
Data shared with physicians via the Internet for possible scheduling of appointment
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- Hyperacuity Grid (Dan Roberts)
https://lowvision.preventblindness.org/2015/11/21/hyperacuity-grid/- A paper version of PHP for do-it-yourselfers
- myVisionTrack® app (Vital Art and Science: Dallas, Texas)
http://myvisiontrack.com/#/-
- The user identifies different shapes to detect subtle changes in vision
Data shared with physicians via the Internet for possible scheduling of appointment
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- Alleye® app (OCULOCARE medical AG)
https://appadvice.com/app/alleye/1045984264-
- Using a smartphone or tablet, the user aligns the middle of three dots in a line
Data shared with physicians via the Internet for possible scheduling of appointment
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Complementing these tests for tracking neovascularization, the following tests are available for personally tracking visual field defects and changes in acuity:
- Visual Field Grid (Roberts)
https://lowvision.preventblindness.org/2013/07/12/visual-field-grid/- Paper test allowing mapping of scotomas (blind spots)
- Visual Field Map
AMD.HealthStorylines.com-
- Interactive online mapping of scotomas (blind spots)
Saves test results for comparison of changes
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- Snellen Chart
https://lowvision.preventblindness.org/2013/07/12/snellen-chart/- Traditional letter chart for checking visual acuity
Self-monitoring can be a valuable adjunct to regular eye exams, saving time and money for patients and professionals alike. Even more valuable is the comfort in knowing that timely intervention against potential vision loss is now within easy reach.