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On 2016/Dec/01, at 09:49, Bill Norwood via Phys-l <phys-l@mail.phys-l.org> wrote:
- It would be a revelation for me indeed if Bates' discovery could explain
modern day contact lens focusing.
Bill Norwood, Physics Dept, U of MD at College Park
2. Why would an insertion at a slight angle work to resolve astigmatism? I
would have thought the lens would be circularly symmetric so the angle at
which it was inserted should not matter but they tell me they were able to
correct about half my mild astigmatism by inserting at 60 degrees (about 2
o’clock when looking from the front). There are asthmatic lens replacements
but I did not get that kind of lens.