Because your eyes haven't yet adjusted (if they will ever adjust) to bright sunlight. Your pupils control the amount of light let in by your eyes. Your pupils haven't closed enough and there is too much light getting in, so you compensate b...
http://answers.yahoo.com/question/index?qid=20090917205...
Be aware of the times that you squint. Recognize the situations that cause you to squint: bright sun light, nighttime, in movie theaters, looking at close or distant objects, etc., and relax your eyes. Ask friends to tell you when your are squinting to help identify the triggers of squinting.
www.wikihow.com/Stop-Squinting www.wikihow.com/Stop-Squinting
I usually find, though, that when I step outside into the bright sunlight from a dark room, I close one eye, but still squint with the other ...
episteme.arstechnica.com/eve/forums/a/tpc/f/77000240783... episteme.arstechnica.com/eve/forums/a/tpc/f/770002407831/m/983007797831
Persons and especially children with exotropia may tend to squint in bright sunlight, unlike children with other types of strabismus. Such people may sometimes benefit from prescription glasses or prisms; however, in most cases, strabismus surgery is required to correct the misalignment.
www.healthandage.com/Home/gid7=52
After a few moments she felt a tap on her shoulder. Five minutes already? She pulled her head up. She had to squint through the bright sunlight to see who it was. The school nurse squinted back at her, her apple cheeks pulled into a simpering smile.
www.ficklemuses.com/
The time has finally come for prescription goggles - Flying Pig Eyewear. ... Prescription Goggles and Sunglasses ... No more having to struggle with clumsy, bad fitting goggles that go over your glasses, or having to squint in bright sunlight.
www.flyingpigeyewear.com/
Strabismus is a condition in which the eyes do not point in the same direction. It can also be referred to as a tropia or squint. ... People who have strabismus often squint in bright sunlight or tilt their heads to focus their eyes.
www.answers.com/topic/strabismus
What is squint? ... Why do cats squint at you? ... Why do you squint in bright sunlight?
www.answers.com/topic/squint-corner www.answers.com/topic/squint-corner
There was something that had not appeared in the scientific lit­erature but which I noticed in this lit­ter, as well as in photographs of other litters: pituitary dwarfs seem to squint in bright sunlight more than do their normal siblings.
www.dogstuff.info/dwarfism_lanting.html www.dogstuff.info/dwarfism_lanting.html
Children may squint one eye in bright sunlight, or may rub one of their eyes. Their vision may become blurry or they may experience double vision when their eyes are misaligned. Some patients say that they can feel that an eye is misaligned, even though they do not see anything unusual.
www.aapos.org/displaycommon.cfm?an=1&subarticlenbr=208
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