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Consider a toric lens whose two surfaces are spherical and toroidal. The spherical side has a...

Consider a toric lens whose two surfaces are spherical and toroidal. The spherical side has a power of +4.0D, while the toroidal side is described by +6.0X90/+2.0X180 A)Determine the power cross B) Find the Sturm interval for a point object at 20cm from the lens

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