Glaucoma & RP Simulators
Eye diseases that can cause constricted visual fields (“tunnel vision”) include glaucoma and retinitis pigmentosa (RP). In the early stages of these diseases, the visual acuity is often unaffected, and only the visual field is compromised (i.e 20 degrees visual field). Advanced disease may lead to a further constriction of the visual field and a loss of visual acuity (i.e. 10 degrees and 20/80 VA).
The impact of vision deficits from visual field loss may be underrated. Since the individual is often able to read and recognize faces, fully-sighted friends and family may dismiss the extent of the limitations on mobility.
Note: the person with a visual field loss does not see the whole visual field -- both the missing areas and the functioning areas -- the way that a fully sighted person will when first putting on one of the simulators. One only sees the area that one CAN see -- not the missing or damaged areas. The brain is very adaptive. To the person with a constricted visual field and average visual acuity, everything looks "normal".
“I recently received a pair of your goggles simulating 10 degrees of tunnel vision. I am very pleased with these goggles and have had the opportunity to let several people try them, so they can understand a little better how I see the world. I won’t tell you the grown up’s verbal response, but my teenage daughters tried them and after about three minutes said, "This isn’t fun." Then they told me they understood a little better how I felt.”Did you know...?~ Roger Buchanan, Richmond, Texas
- Glaucoma is the second leading cause of blindness in the US and is the leading cause of blindness among African-Americans.
- Glaucoma has no warning signs. Left untreated, glaucoma can lead to permanent vision loss or blindness.
- RP is characterized by progressive visual field loss and night blindness. Its occurrence is reported to be between 1 in 2,000 and 1 in 7,000 and is more common in males.
- In the US, one definition of "legal blindness" is a visual field no greater than 20°. Our 20 degree simulator portrays this maximum level of visual field allowed in determining this status.
To see Goldmann visual fields of these simulators, click the tab at the top of this section.
Are you buying this for yourself or a family member who has low vision? Please read what to expect.
Goldmann Visual Fields
Goldman Visual Field Simulators for Tunnel Vision 10 degree and Tunnel Vision 20 degree.
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Goldmann visual fields - with 10° visual field
Goldmann visual fields - with 20° visual field