Contact Len Fitting philosophies

Question 1

Soft CL fitting is based on?

Answer 1

THREE-POINT TOUCH:

Corneal Apex

Limbus

Peri-limbal Region

Question 2

Remedy if Lens has Tight/Steep fit:

Answer 2

Flatten BOZR

Reduce TD (OAD)

Question 3

Remedy if lens has Loose / FLAT FIT:

Answer 3

Steepen - BOZR

Increase - TD

Question 4

Remedy if Lens is DECENTERED:

Answer 4

Increase TD

Question 5

Comfort level if Tight / Steep Fit:

Answer 5

Comfortable at First

Question 6

Comfort level if LOOSE / FLAT FIT

Answer 6

Uncomfortable

Question 7

Centration if LOOSE / FLAT FIT:

Answer 7

Decentered / off-center

produces corneal exposure

Question 8

Vision when blinking if TIGHT / STEEP FIT:

Answer 8

BOV - after blink

Question 9

Vision when blinking if LOOSE/FLAT FIT:

Answer 9

Clear Vision - after blink

Question 10

Push-up test if TIGHT / STEEP FIT:

Answer 10

Resistance to Movement - Sluggish recovery

Question 11

Push-up test if LOOSE/FLAT FIT:

Answer 11

EXCESSIVE movement - erratic recovery

Question 12

Retinoscopic Reflex if TIGHT/STEEP FIT:

Answer 12

Crisp & Clear

Question 13

Retinoscopic reflex if LOOSE/FLAT FIT:

Answer 13

BLURRED REFLEX

Question 14

Primary Gaze movement amount if Optimum fit:

Answer 14

0.2 - 0.4 mm

IDEAL MOVEMENT

Question 15

Primary Gaze movement if TIGHT/STEEP FIT:

Answer 15

less than 0.2 mm

Question 16

Primary Gaze movement if LOOSE/FLAT FIT:

Answer 16

greater than 0.4 mm

Question 17

Vision if contact lens has Optimum fit:

Answer 17

Crisp. Clear. Stable

Question 18

Vision if the contact lens Has tight / steep fit:

Answer 18

Clear.

but not stable

Question 19

Vision when contact lens has a Loose / flat fit:

Answer 19

only clear after Blinking,

Variable vision after blinking

Question 20

Corneal Coverage if CL has Optimum fit:

Answer 20

Full coverage in primary gaze at ALL times

with @least 1-2mm overlap

Question 21

Corneal coverage if Tight / Steep fit:

Answer 21

Full coverage but not at all times

Question 22

Corneal Coverage if Loose / flat fit:

Answer 22

NOT full

Corneal exposure @ extremities of gaze

Question 23

Edge alignment if lens has Optimum fit:

Answer 23

Regular & Uniform alignment to the conjunctiva all throughout

Question 24

Edge alignment if tight / steep fit:

Answer 24

Regular & uniform all throughout

BUT

has Conjunctival indentation or Peri-limbal imprint

(causes stagnation of tears & reduced Oxygen supply)

Question 25

Edge alignment if LOOSE / FLAT FIT:

Answer 25

NOT regular

edge stand-off or Fluting

Question 26

Lens Lag if Optimum fit:

Answer 26

no lens lag

Question 27

Len lag if tight / steep fit:

Answer 27

no lens lag

Question 28

Lens lag if loose / flat fit:

Answer 28

Excessive

especially at extreme gaze