Optical Test

Front 1

Lensometer

Back 1

Spring loased are on a lenometer or vertometer that holds lens for reading and marking

Front 2

Abbe value

Back 2

Meaaure materials to disperse light

Front 3

Which occupants would be best suited for a double segment lens?

Back 3

Electrician

Front 4

Selecting a frame for a progressive power lens candidate avoid

Back 4

Aviator shaped frame PD larger than patients PD

Front 5

Reverse slab off is for

Back 5

plus power

Front 6

Multifocal height measures from

Back 6

Lower edge of lens

Front 7

Distance between segments and fused double segment multifocals in most cases is

Back 7

13mm

Front 8

Semi rimless mounting

Back 8

Center piece w lens bars connecting endpiece to temples

Front 9

Geneva lens measures

Back 9

Base curve

Front 10

Corrected curve lenses

Back 10

Less oblique astigmatism

Front 11

Power drum

Back 11

Large wheel on lensometer or vertometer used to read the power of lens

Front 12

Near or accommodative reflex

Back 12

Papillary construction, accommodation and convergence

Front 13

Retina

Back 13

Back of the eye, retina senses light and creates impulses sent through optic nerve

Front 14

Scotoma

Back 14

Reduced sensivity or loss of vision

Front 15

Aspheric lenticular

Back 15

Aspheric lens to improve thickness and weight in High plus powers

Front 16

Chromatic aberration

Back 16

Breaking up of white light by lens material

Front 17

Prism reference point, same as major reference point

Back 17

Point on lens specified prism in perscription

Front 18

Sphere power

Back 18

Corrects myopia, hyperopia or presbyopia but mot dor astigmatism

Front 19

Iseikonic lenses

Back 19

Reduce anisekona from magnification between right and left eye in anisometropia

Front 20

Hinge

Back 20

Connnets temple to endpiece

Front 21

Right is minus and left is plus is condition called

Back 21

Auntie metropia

Front 22

Cataract spectacle lens are best as

Back 22

Aspheric curves

Front 23

Vertical angle or nose pads

Back 23

Requires bottom edge of pad to be closer to a wires then top edges of pads

Front 24

Monel

Back 24

Frame made of nickel and copper, lightweight. Most used in metal frames

Front 25

Reticle

Back 25

Thin black circles seen in a piece of lensometer or vertometer. Marking verification of power and measure prisms

Front 26

Spray angle or nose pads

Back 26

Angle of slope of crest of nose to inner eye area

Front 27

Vertex power

Back 27

Total Power of Lens in dioptric units

Front 28

Axis drum

Back 28

Large drum on lensometer Mark 0 to 180 degrees, finds access location

Front 29

Crown glass index of refraction is

Back 29

1.523

Front 30

C.R. 39 index of refraction is

Back 30

1.49

Front 31

Polycarb index of refraction is

Back 31

1.586

Front 32

High index of refraction is

Back 32

1.6

Front 33

Flint glass index of refraction is

Back 33

1.805

Front 34

Polycarb specific gravity is

Back 34

1.20 , and abbe value is 31

Front 35

Crown glass specific gravity is

Back 35

2.54 , and abbe value is 58

Front 36

C.r. 39 specific gravity is

Back 36

1.32 , and abbe value is 58

Front 37

High index glass specific gravity is

Back 37

2.73, abbe value is 42. high index gravity is 3.37 , abbe value 25

Front 38

Listings plane

Back 38

Imaginary ocular plane lying on the X & Y axis

Front 39

A verto meter cannot measure or locate the

Back 39

Bifocal segment, it also cant measure a aspheric lens

Front 40

A C.R. 39 lens used for cataract is

Back 40

Lenticular

Front 41

Vertex power is the lens

Back 41

Thickness

Front 42

Zylonite

Back 42

Plastic frame made of cellulose acetate. Commenly used frame

Front 43

Temple

Back 43

Frame that extends hinge to ear that holds against skull

Front 44

Focal point

Back 44

Where rays of light converge or diverge after refraction through lens

Front 45

Reticle

Back 45

Prism measurement indicator on vertometer or lensometer

Front 46

Main reason lenticular lens for high plus used is for

Back 46

Lighter weight

Front 47

High dispersion like flint glass can cause

Back 47

Chromatic aberration discomfort

Front 48

Optical cross shows

Back 48

Meridian powers of lens

Front 49

Lens calipers are used for

Back 49

Lens thickness

Front 50

When pantoscopic angle increases

Back 50

Lower optical centers

Front 51

The "BOXING METHOD" LOCATES

Back 51

geometric center of lens

Front 52

Prism power os determined by

Back 52

The amount lens turns light from its original course

Front 53

Polycarbonate is

Back 53

Greater than that of crown glass

Front 54

Ednpiece

Back 54

Connecta eyewire to hindge

Front 55

Eyepiece

Back 55

Part of a lensometer or keratometet. The user looks. Eyepiece is focused by operator

Front 56

Polyamide

Back 56

Frame made of nylon and other. Its injection molded, colorfast, hypergenic and flexible

Front 57

Mires

Back 57

Luminous object projected through lensometer. One set of lines is sphere power. The other set is cylinder power

Front 58

C size

Back 58

Measures in millimeters of circumference of an edged lens

Front 59

Vergence

Back 59

When eye movements in eyes move away from each other

Front 60

'A' box measurement

Back 60

Measures horizontal distance from farthest nasal point to farthest temporal point of shape

Front 61

Binocular

Back 61

Both eyes working together

Front 62

Convergence

Back 62

When eyes focus toward each other... To foucus on an object