REVISION 3 PURKINJE IMAGE

REVISION 3 PURKINJE IMAGE

PURKINJE IMAGE

Image form by the reflection of object from the eye structure.

Purkinje Image I

• formed by reflection at anterior corneal surface

• the brightest images

• the image is erect & virtual

• also known as the corneal reflex

Purkinje Image II

• formed by reflection at posterior corneal surface

• very close to the 1st image & being faint

• the image is erect & virtual

Purkinje Image III

• formed by reflection at anterior lens capsule

• the image is erect & virtual

• in the unaccommodated eye, it is larger than the 1st image & lies in the vitreous

Purkinje Image IV

• formed by reflection at the posterior lens surface

• the image is real & inverted

Application of Purkinje Image

locate the eye’s optical axis

Multiple Select

Which Purkinje Image use to determine the position & radii of crystalline lens surfaces?

• Purkinje Image I

• Purkinje Image II

• Purkinje Image III

• Purkinje Image IV

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