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Presentation transcript:

Lens from a Cow’s Eye

Focal PointLENS Principle Axis

Lens

Blind Spot Focus your LEFT eye here. Slowly move the penny to the LEFT

Far Sighted Near Sighted

FAR AWAY CLOSE TO CLOSE and SMALL FAR and LARGE FAR SIGHTED NEAR SIGHTED

FAR AWAY CLOSE TO FAR SIGHTED NEAR SIGHTED

FAR AWAY FAR SIGHTED NEAR SIGHTED CLOSE TO

FAR AWAY FAR SIGHTED NEAR SIGHTED CLOSE TO

Far Sighted

Near Sighted

Astigmatism (Spherical Aberration) Light doesn’t converge to the same point Squinting to help clarity

LASIK Surgery

LASIK Surgery

Reshaping cornea to compensate for the lens.

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