Lens and Vitreous

Question 1

lens and vitreous (meekins)

Lens Anatomy

Answer 1

Question 2

lens and vitreous (meekins)

Lens Physiology

Answer 2

Question 3

Lens Congenital Defects

Answer 3

• Persistent fetal vasculature
– Persistent hyaloid artery (or remnant)
• Pupillary membrane
– Iris-to-lens PPM (focal cataract)
– Axial anterior lens capsule pigment spots

Question 4

lens and vitreous (meekins)

Nuclear Sclerosis

Answer 4

Question 5

lens and vitreous (meekins)

Cataract

• what
• classification
• reflexes

Answer 5

• Cataract = opacity in the lens or capsule
• Classification
– Etiology
– Age of onset
– Location in lens
– Stage of development
• Patient with a cataract should have a normal PLR and dazzle reflex!

Question 6

lens and vitreous (meekins)

Cataract Etiology

Answer 6

Question 7

lens and vitreous (meekins)

Cataract Age of Onset

Answer 7

Question 8

lens and vitreous (meekins)

Cataract Location

Answer 8

Question 9

lens and vitreous (meekins)

Cataract Stage

Answer 9

Question 10

Lens Metabolism

Answer 10

Question 11

Why should you worry about cataracts
(other than causing vision loss)?

Answer 11

Question 12

lens and vitreous (meekins)

Cataract Medical Therapy

Answer 12

Question 13

lens and vitreous (meekins)

Cataract Surgery

Answer 13

Question 14

lens and vitreous (meekins)

Cataract Surgery Work-Up

Answer 14

Question 15

lens and vitreous (meekins)

Cataract Surgery Complications

Answer 15

Question 16

Lens luxation

Answer 16

Question 17

Lens Luxation – describe based on lens position

Answer 17

Question 18

Lens Luxation

• primary
• secondary

Answer 18

Question 19

lens and vitreous (meekins)

Anterior Lens Luxation Treatment

Answer 19

Question 20

lens and vitreous (meekins)

is lens luxation an emergency?

Answer 20

Question 21

lens and vitreous (meekins)

Lens Luxation Management

• primary lens subluxation
• posterior lens luxation

Answer 21

Question 22

Vitreous

Answer 22

Question 23

Vitreous Abnormalities

Answer 23

Question 24

Asteroid Hyalosis

Answer 24

• Small white particles within vitreous
– Calcium or phospholipids
– “Snow globe” effect
– Move with eye movement
• Usually incidental finding

Question 25

# lens and vitreous (meekins) **_Summary_** * The optimal stage for cataract surgery is… * Cataracts are…, but nuclear sclerosis is… * Anterior lens luxation is… * Lens subluxation and posterior luxation are often managed medically with…

Answer 25

* The optimal stage for cataract surgery is **immature (vision impairment but no LIU)** * Cataracts are **opacities that block light**, but nuclear sclerosis is **an expected aging change that causes hardening of the central lens (decreased accommodation)** * Anterior lens luxation is **an ophthalmic emergency** * Lens subluxation and posterior luxation are often managed medically with **miotics**