Page 1 of 3: ophthal

tulip · Credits: 21986 My Scrapbook

most imp factor for convergence of light rays
1.axial lenght of eyeball
2.curvature of cornea??

draditithegreat · Credits: 1247960 My Scrapbook

curvature of cornea-------

chk out khurana:: most imp in refraction is cornea!

subhuman · Credits: 731 My Scrapbook

I think point here is CONVERGENCE not REFRACTION. In terms of refraction cornea contributes about 2/3 of total refractive power of eye and lens contribute mere 1/3. But when we talk about convergence i think most important factor should be axial length of an eyeball. Perhaps thats why most common cause of hypeopia is change in axial length of eyeball.

tulip · Credits: 21986 My Scrapbook

draditithegreat · Credits: 1247960 My Scrapbook

well i agree that most common cause is change in axial length which leads to the change in convergence!

if u can draw on a paper then please see:
that the how does the curvature can lead to the convergence or divergence! imagine a plane mirror and another a concave one: how wud a light ray pass? doesnt it depend on curvature no matter how much length we give to it?

because that is how we treat the refractive errors!

subhuman · Credits: 731 My Scrapbook

decembermist · Credits: 41121 My Scrapbook

mudit khanna says its curvature of cornea

AshB · Credits: 41813 My Scrapbook My Reading List 6 Books

I maybe wrong but look at it this ways..

Simply convergence (as asked in above question) is undoubtedly determined by the refractive power of eye.. Which in turn is dominated by corneal curvature. The more the power, more d light rays will converge. I dnt think there is any confusion on that.

But if we talk of convergence on retina (as asked in d other post) than maybe axial length myt be more important. Language of questions myt affect d answer.

What do u guys say??

tulip · Credits: 21986 My Scrapbook

yes i agreee on tht AshB!

gandalf · Credits: 8375 My Scrapbook

again!!!!!

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