On 11/02/2020 11:08:17, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
I'm with Tim here. A lot of deterioration of sight is through lack of
use of the accommodation muscles. While the lens does harden my sight
deteriorate most when sedentary and focussed onto a screen with a blank
wall behind. Since then I choose to sit where if I look over a monitor I
have a distant view.

Err, someone with perfect vision will only choose to have reading specs
when it becomes impossible to focus close enough without.

Err, there is no such thing as 'perfect vision'. I'm sure many can read
adequately without reading specs at all stages of life. The only issue
is they might not be able to focus at distance without assistance.

The worst killer for accommodation is varifocal lenses. The eye muscles
become very lazy.

Why would you get varifocals if you still could accommodate OK?

Well, that discounts just about everyone in their later stages of life:

https://en.wikipedia.org/wiki/Accomm...4_modified.svg