lens material gives a brief description about the materials being commonly used for making lenses

DONE BY, S ARYA DAS 2 nd YR, 3 rd SEM BHARTIMAIYA COLLEGE OF OPTOMETRY

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Page 1: Lens material gives a brief description about the materials being commonly used for making lenses

DONE BY,S ARYA DAS

2nd YR, 3rd SEMBHARTIMAIYA COLLEGE OF OPTOMETRY

Page 2: Lens material gives a brief description about the materials being commonly used for making lenses

INTRODUCTION

Page 3: Lens material gives a brief description about the materials being commonly used for making lenses

CROWN GLASS

Crown glass resist scratching

It is not easily affected by the environmental factors.

It has a refractive index of 1.523.

This material is low in chromatic aberration.

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HI-INDEX PLASTICS

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• It is a very impact resistant lens material.

• Trivex is a triperformance lens material.

• It offers a triple ccombination of :-

(i) Superior optics

(ii) Impact resistance

(iii) Ultra light weight

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NXT material

Page 13: Lens material gives a brief description about the materials being commonly used for making lenses

• Lenses that are made of two or more layers of materials are known as laminated lenses.

• Lamination is done in polarizing lenses to cut out reflected glare.

• Lamination can also be done to increase impact resistance

Page 14: Lens material gives a brief description about the materials being commonly used for making lenses

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