Just a question to the doctors out there who are good with optics and physiology: How is it possible for my 11 diopter patient to see 20/25 uncorrected without squinting? I mean, she functions fine without glasses. She has never had glasses and is currently 25 years old. Here are the exam findings: VAsc, OU: 20/25-2 VAcc, OU: 20/20 MR: OD: -11.00 DS OS: -11.00 DS RET: OD: -11.25 DS OS: -11.25 DS SLEX: WNL FUNDUS: posterior staphyloma OU Subjective comments: with corrective lenses, things are sharper, but not significantly sharper. Also, everything is more vivid and brighter. However, letter clarity is about the same as it was before. Can anyone explain this? I was careful to notice if the patient squinted at all. And there was no squinting what-so-ever. I tested VA with lights on and off. In outdoor environments and indoor.