Function of the Ciliary Body

Question 1

Order of Iridocorneal Angle

Answer 1

Iris
Ciliary Body
Scleral Spur
Trabecular Meshwork
Schwalbe's Line

Question 2

Schwalbe’s Line

Answer 2

connects cornea and conjunctiva

end of Descemet’s

Question 3

Ciliary Muscle

Answer 3

smooth m but looks skeletal

contracts quickly

Question 4

Functions of Ciliary Body

Answer 4

aqueous production
aqueous outflow
accommodation

Question 5

Provides large surface area for secretion in posterior chamber

Answer 5

ciliary processes

Question 6

Diffusion

Answer 6

uneven distribution of molecules across a membrane

mol move from high to low concentration

Question 7

Ultrafiltration

Answer 7

bulk flow across semipermeable membrane by hydrostatic pressure

Question 8

Active Secretion

Answer 8

mol transported across membrane against concentration gradient
uses energy
80-90% of aqueous production

Question 9

Drives secretion

Answer 9

Na and Cl movement

Question 10

Purpose of Aqueous

Answer 10

nutrients to cornea and lens
free radical that prevents oxidative damage
prevents light scatter (few proteins)
carries away waste

Question 11

Rate of aqueous production

Answer 11

2.5 uL every minute

Question 12

Zonular Fibers

Answer 12

70-80 nm diameter
elastic
stabilize lens and allows fluid to flow from post to vitreous chamber

Question 13

Accommodation is completely lost by age _____

Answer 13

50

Question 14

Action of Accommodation

Answer 14

ciliary body contracts, zonules relax, lens thickens

Question 15

Meds that paralyze ciliary muscles

Answer 15

Muscarinic antagonist

atropine, cyclopentolate, tropicamide

Question 16

Reduced near vision in presbyopes primarily comes from…..

Answer 16

lens thickening

Question 17

Accommodation ______ aqueous flow

Answer 17

increases

Question 18

Tyndall Phenomenon

Answer 18

cells and flare, hypopyon

from breakdown of blood- aqueous barrier

Question 19

Hyphema

Answer 19

tear or break of major circle of iris

blood in ant chamber