Telemedicine Visual Field Test for Glaucoma Screening
Glaucoma is an eye disorder in which the optic nerve of the affected eye(s) suffers permanent damage, and progressing to complete blindness if untreated.It is a major cause of preventable progressive blindness. Of every 30 people over the age of 50, one will be affected by glaucoma, nearly half of those do not know they have the disease.Most patients with early glaucoma have normal vision and enjoy a healthy and productive lifestyle despite advancing disease.
Often, but not always, glaucoma is associated with increased intraocular pressure (IOP) in the eye. The term 'normal' or 'low tension glaucoma' is suggested for the typical visual field test defects when associated with a normal or low IOP. Raised intraocular pressure is a significant risk factor for developing glaucoma (above 21 mmHg or 2.8 kPa). One person may develop nerve damage at a relatively low pressure, while another person may have high eye pressure for years and yet never develop damage. Visual field loss loss often occurs gradually over a long period of time, and is recognized only when the disease is quite advanced.
Visual field test is a very important exam in the diagnosis and treatment of glaucoma. This 5-minute test is a virtual perimetry system. It is a powerful tool for self-care and will help you become aware of any significant defects in your visual field. You can use it to test your visual fields at your home computer, on any standard computer monitor. It allows self-testing and is convenient, fast and easy to use. It can reveal the first signs of glaucoma and will help you detect visual fields defects early but you have to practice to get the test right.
The software uses the web camera as a virtual "light-meter" and allows you to email your test results to your doctor. The purpose of the test is only to detect signs of visual field loss before it is too late for the vision. The test is not a substitution for a medical exam. The result should be interpreted by an ophthalmologist.
The software is free for non profit use. You can download the software here.
The software is tested against viruses with Microsoft Security Essentials. AVIRA is not compatible. Some antiviruses (avira) use "heuristics" methods. Heuristics provides better detection capabilities but gives a lot of false positives ( https://www.avira.com/en/support-for-home-knowledgebase-detail/kbid/298
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