In article ,
The Natural Philosopher wrote:
On 14/02/2020 14:18, NY wrote:
Because if they set one eye to infinity and the other to reading
distance then *if the brain can cope with it* you have good vision at
both ends of the distance range without needing glasses for either. My
question was "is that feasible or can the brain not cope with
ignoring whichever image is out of focus?". I'm guessing that it
isn't, otherwise people who haven't had a cataract replaced would
wear glasses that had lenses of different strength so a single pair
of glasses, worn all the time, will cater for all situations without
the need for multiple pairs, bi/tri-focals or vari-focals. (*)

Utter total ********

Some do apparently get on with one normal eye one short sighted. But I
really can't see that being as good as having as near perfect distance
vision as possible.

--
*If you try to fail, and succeed, which have you done?

Dave Plowman London SW
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