Ophthalmic Optics 2 Exam 1

Front 1

effects of UV radiation on ocular tissue

Back 1

1. photokeratitis
2. pterygia
3. pinguecula
4. climate droplet keratopathy
5. cataract
6. retina (aphakia)ef

Front 2

effect of IR radiation on ocular tissue

Back 2

1. corneal opacification
2. iris congestion, depigmentation, and atrophy
3. lens exfoliation cataract
4. retina (necrotic burns)

Front 3

% reflected = (equation)

Back 3

((n'-n)^2/(n'+n)^2)I

Front 4

transmission formula

Back 4

Tu= T1 x T2 x T3

transmission through lens system is product of individual transmissions

Front 5

opacity= (equation)

Back 5

1/T

Front 6

photochromic lenses characteristics

Back 6

1. respond primarily to UV radiation
2. temperature dependent

Front 7

polarizing lenses characteristics

Back 7

1. block reflections that are horizontally polarized
2. analyzer oriented vertically

Front 8

what are the ANSI standards for tinted lenses
1. general purpose
2. cosmetic
3. special purposes

Back 8

1. general purpose
8-40% T

2. cosmetic
>40% T

3. special purposes
3-7% T

Front 9

what is the rule for tinted glasses? when should they be used

Back 9

1. sunglasses for bright outdoor conditions should be 10-20% T
2. lenses with T<8% should NOT be used for driving
3. NO TINT should be used for night driving

Front 10

what is anisometropia

Back 10

1. different dioptric power in each eye
2. risk factor for amblyopia based on refractive error

Front 11

8 ways to deal with vertical imbalance

Back 11

1. lowering distance OC
2. single vision lenses for reading only
3. dissimilar bifocal seg
4. compensated bifocal seg
5. prism seg
6. slab off prism
7. fresnel press on prism
8. contact lenses

Front 12

relationship in eikonic lens design

Back 12

1. decrease mag of more plus lens (flatter/thinner)
2. increase mag of more minus lens (steeper/thicker)

Front 13

knapps law

Back 13

1. fit axial ametropes with SPECTACLES
2. fit refractive ametrope with CONTACT LENSES

estimating aniseikonia
1% per diopter of anisometropia