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8 Cards in this Set

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  • Back

How thick is a fresnel lens

1mm

Advantages of a fresnel lens

Thin and lightweight

Can you apply to spectacle lens ?

Yes it is flexible and can be done in house

Can it be cut into any shape?

Yes because it is made of soft and flexable material

Disadvantages of fresnel lens ?

Harder to clean


Are more noticeable

Fresnel lenses are to be placed base out, will the visible lines on the lens be horizontally or vertically oriented ?

Vertically

True or false : can fresnel prism be used to slow nystagmus ?

True

Fresnel prisms are applied to :

Back of the spectacle lens w the smooth side in