الفهرس 
Ocular developmentOnly 14 pages are availabe for public view
 |  | from | 56 |  |  |
| | | from | 56 | | |
Abstract
At birth, normal eye is rarely emmetropic. At two years, the mean value shifts so that the eye
becomes closer to emmetropia .This process is called emmetropization , and within populations,
it’s possible to predict shifts in refractive error so that most infants are born hyperopic and
become near emmetropic by 6-8 years of age.
Cataract is regarded the most common lens abnormality. Congenital cataract responsible for
nearly 10% of all visual loss in children worldwide. The etiology of the vast majority of the
cataract is unknown.
Among the problems which arise regarding the use of intraocular lenses (IOLs) in the pediatric
population is the question of the power of the implant that should be used considering the
expected growth of the child’s eye.
A number of formulas for IOL power calculations have been published; all these formulas are
based on an accurate measurement of the corneal power and of the axial length. In a recent
study it was shown that the SRK/T formula was more accurate than empirical formulas in
calculating IOL power in short eyes and they found increasing prediction error for shorter eyes
in their series.
Key Words:
Development of the eye and ocular growth, Basic optics for IOL power calculations,
Choice of IOL power in pediatric cataract.