2006-08-07 11:39:17 · 9 answers · asked by veronica b 1 in Entertainment & Music ➔ Jokes & Riddles
This squinting occurs only when the reason of poor vision is a refractive error... like myopia, hypermetropia or astigmatism...
The reason is that it causes what is called "Pin hole effect"... when a patient has a refractive error the light entering the eye doesn't all come in exact focus... it doesn't end up by a point of focused light on the retina but rather a small area.... so narrowing the enterance sharpens this focus more and more and hence improve the visual acuity... anyone with refractive error can try that at home... if you have myopia (short sightedness) or hypermetropia (far sightedenss) or astigmatism... try to take off your glasses and look at a distant object and then try to look at it through a very small hole in a paper.. you will see it clearer through the hole..
This is the basis of what is called "Pin hole test"... if you have a patient complaining of poor vision and you want a simple test to differentiate if that complain is due to refractive error or another retinal problem, just make him view the test chart through pinhole... if he sees better through pinhole then it is a refractive error.. however in case of retinal diseases (or other diseases) he will see worse through the pinhole..
So not all patients with poor vision would simply squint to see... if you see someone with cataract and trying to see something unclear in the distance you will find him widening his eyes to allow more light in... he won't squint then...
2006-08-08 06:14:53 · answer #1 · answered by Anonymous · 3⤊ 1⤋
Squinting changes the eyes' focus.
2006-08-07 18:49:02 · answer #2 · answered by connorsmom916 3 · 0⤊ 0⤋
it just is because less eye space help the eye become clearer for it to see and makes the eye see better like glasses over it
2006-08-07 18:42:59 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Because they can focus more looking out of a small space as opposed to a large one.
2006-08-07 19:02:37 · answer #4 · answered by *333Half-Evil* 4 · 0⤊ 0⤋
oh my goodness! another unique and cute question...i wonder humans do that too...i just did it, and it doesn't help at all.....all you really see is a little bit of aura and yes, you get less space to see out of....just did it again...didn't help at all....your questions are hilarious!
2006-08-08 00:15:16 · answer #5 · answered by blue_bee 4 · 0⤊ 0⤋
Believe it or not, you get better focus, just wait till you get a bit older, then you will know what I'm talking about!.......:)
2006-08-07 19:09:59 · answer #6 · answered by tictak kat 7 · 0⤊ 0⤋
it makes the cristalin become rounder,and thus,the lens that it is changer its center,thus the light is reflected differently,and the image is more clearly projected;but that only for those who need minus(-)lens;those who need plus(+)need to open their eyes more widly:)
2006-08-07 19:03:03 · answer #7 · answered by dea_ro7 3 · 0⤊ 0⤋
Try focusin on something u'll do the same
2006-08-07 18:47:56 · answer #8 · answered by Anonymous · 0⤊ 0⤋
cuz that's what you do when you get SKEET SKEET SKEET on your face.
2006-08-07 18:42:51 · answer #9 · answered by VetteLeo 6 · 0⤊ 0⤋