Eyezone Optic

19/07/2025

18/07/2025

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15/07/2025

13/07/2025

The lens is a transparent, biconvex structure of crystalline appearance placed between the iris andthe vitreous. It is suspended by the suspensory ligament of the lens or zonule of Zinn which is
attached to the ciliary body and equator of the lens. The accommodative power varies with age,being 14 to 16 D (at birth), 7 to 8 D (at 25 years of age) and 1 to 2 D (at 50 years).
The lens is composed of 64% water, 35% protein and 1% lipid, carbohydrate and trace elements.
The metabolism of the lens is anaerobic. Glycolysis is responsible for 85% glucose utilization resulting
in lactate formation.
Refractive index = 1.39
The dioptric power = 15 to 18 D
Diameter = 9-10 mm
Thickness = 4 mm
Radius of curvature
i. Anterior surface = 10 mm (less convex or flat)
ii. Posterior surface = 6 mm (more convex)
Weight = 250 mg (approximately). The lens grows in size continuously throughout life. At birth itweighs about 65 mg and by 80 years of age it weighs approximately 258 mg.

13/07/2025

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05/12/2023

SPECTACLE REPAIRS IN NEGOMBO
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