It's the equivalent of holding your arm up in the air for a long time.Eventually it becomes fatigued and beings to ache.
You have to lower it for the pain to subside.
The lens defaults to middle distance, and both near and far sighting puts the muscles of the lense under strain.
Thus why it is recommended to get up and look at far away things every hour or so.
It is difficult to focus on far away things in the dark, thus it is better to have the light on.
Also, yes, it affects the iris.
(You have to lower it for the pain to subside.
The lens defaults to middle distance, and both near and far sighting puts the muscles of the lense under strain.
Thus why it is recommended to get up and look at far away things every hour or so.
It is difficult to focus on far away things in the dark, thus it is better to have the light on.
Also, yes, it affects the iris.
Quijibo Esq. BSc. May contain traces of nuts,
Sat 23 Aug 2008, 18:49,
archived)