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IN THE NAME OF ALLAH WHO IS MOST MERCIFUL AND GRACIOUS
Light rays converge behind retina and a converging or a convex lens or black lens in refraction box is required to focus light onto retina. The first diagram shows how light rays converge behind retina. The second diagram shows a converging lens converges light onto retina.
TREATMENT
TREATMENT
A convex lens is used to treat hypermetropia. In young children hypermetropia upto +4 is not corrected. Above this 2/3rd of refraction is given. In case of squint full cycloplegic refraction is given deducting only the working distance.
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