I encountered someone who has a stereoacuity of 400secs Titmus Stereofly (unaided). No abnormalities in Worth-4-dot. Near VA 20/20 @ 40cm RE and LE. However he is -1.75DS in BE.
I did check the pola visors and the chart beforehand. Only one thing I didn't check was the lighting.
Q: in this case besides lighting, can there be any other causes of the reduced stereoacuity?
Q: and also, is it possible to have fusion but no stereopsis?
thx!
I did check the pola visors and the chart beforehand. Only one thing I didn't check was the lighting.
Q: in this case besides lighting, can there be any other causes of the reduced stereoacuity?
Q: and also, is it possible to have fusion but no stereopsis?
thx!