How Will You Explain The Growth And Development Of Refractive State, Iris And Position Of Eye?

Refractive State
About 80% of children are boom hyperopic, 5% myopic, and 15% hemitropic. Hyperopic increases until about 7-8 years of age and then gradually decreases until 19 or 20 years of age. After age 7 or 8, myopia gradually increases until about 25 years. (Hyperopia decreases much less than myopia increases.) There is usually little change in refractive error during the third and fourth decades. Presbyopia occurs in almost all people at age 42-46.

Iris
At birth, there is little or no pigment on the anterior surface of the iris; the subsequent pigment layer showing through the translucent tissue gives the eyes of most infants a bluish color. Less iris stroma pigmentation results in blue, hazel, or green.

Position
During the first 3 months of age, eye movements may be so poorly coordinated (because of the normally slow development of reflexes) that doubt may exist about the straightness of the eyes. Most of the binocular reflexes should be well developed by 6 months of age. Deviation that persists beyond age 6 months should be investigated.