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In the Zonule
Productions provides
educational seminars in low
vision rehabilitation to rehabilitation professionals. Click the "Z" logo to
find out more.
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DICTIONARY OF EYE TERMINOLOGY
5th edition
*********************
Where
are the "Growing Old is Not For Sissies" posters,
cards and magnets?
I no
longer carry these items, but may have a few left. Contact me if you're
interested.
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A goggle before it becomes a
simulator
Click on it to go to
the simulators page |
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Fork in the Road Bag
Click on it for a
larger picture |
Read
The Road Not Taken and other
thoughts about forks in the road.
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#103 Visual field of 10°
and a visual acuity of 20/80 (6/24)* |
#104 Visual field of 20°
and no impairment of visual acuity |
Click on picture for enlarged view.
These simulators are modeled by Gnome brothers, Bruce and Lucas.
Tunnel Vision
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 not affected, only
the visual field (Item # 104).
Did you know...?
- Glaucoma is the second leading cause of
blindness in the US and is the leading cause of blindness among
African-Americans.4
- 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.5
- In the US, one definition of "legal blindness"
is a visual field no greater than 20°. Item #104
portrays this maximum level of visual field allowed in determining this
status.
- To see Goldmann visual fields of
these simulators, click here.
Pricing
| Description |
Item # |
Price |
| Visual field of 10°
and a visual acuity of 20/80 (6/24)* |
103 |
$33 |
| Visual field of 20°
and no impairment of visual acuity |
104 |
$33 |
| *Visual acuities are approximate |
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