Midterm

Question 1

What does rose Bengal do

Answer 1

Stains devitalized cells

Question 2

Which of the following slit lamp illuminations is used to observe corneal thickening, thinning, and the depth of scars?

Answer 2

Optic section

Question 3

Which of the following slip lamp illuminations is used to observe fluorescein patterns?

Answer 3

Diffuse

Question 4

Which of the following slit lamp filters should b used to observe neovasvularization?

Answer 4

Red free

Question 5

Which of the following illuminations would be used to detect vertical striae?

Answer 5

Direct focal parallelpiped

Question 6

In addition to direct focal, which of the following illuminations should be used to observe a pinguecula?

Answer 6

Indirect

Question 7

Fluorescein which has been instilled into the eye is best illuminated by?

Answer 7

Cobalt

Question 8

Which of the following slit lamp illuminations is best to view the endothelium?

Answer 8

Speculation reflection

Question 9

Which illumination would be used to detect disturbances in the normal corneal transparency

Answer 9

Sclerotic scatter

Question 10

Who described the idea of neutralizing the front surface of the cornea in 1508?

Answer 10

Leonardo da Vinci

Question 11

Who started looking at the cornea and found out about accommodation and astigmatism In 1801

Answer 11

Thomas young

Question 12

Who fitted for fitted glass shell in 1887?

Answer 12

F.A Muller

Question 13

Who fitted the first glass lens to be worn to correct vision in 1888?

Answer 13

A.E Fick

Question 14

Who described the idea of neutralizing the front surface of the cornea in 1508?

Answer 14

Leonardo da Vinci

Question 15

Who started looking at the cornea and found out about accommodation and astigmatism In 1801

Answer 15

Thomas young

Question 16

Who fitted for fitted glass shell in 1887?

Answer 16

F.A Muller

Question 17

Who fitted the first glass lens to be worn to correct vision in 1888?

Answer 17

A.E Fick

Question 18

Who described the idea of neutralizing the front surface of the cornea in 1508?

Answer 18

Leonardo da Vinci

Question 19

Who started looking at the cornea and found out about accommodation and astigmatism In 1801

Answer 19

Thomas young

Question 20

Who fitted for fitted glass shell in 1887?

Answer 20

F.A Muller

Question 21

Who fitted the first glass lens to be worn to correct vision in 1888?

Answer 21

A.E Fick

Question 22

Who made the first all plastic contact lens In 1938? (PMMA CL)

Answer 22

Mullen & Obrig

Question 23

Who made the first all plastic contact lens In 1938? (PMMA CL)

Answer 23

Mullen & Obrig

Question 24

When does FDA classify a soft lens as a drug?

Answer 24

1968

Question 25

Who discovered the use of fluorescein in the use of contacts in 1938?

Answer 25

Theodore Obrig

Question 26

In what year did vistakon get their first disposable lens approved by the FDA?

Answer 26

1987

Question 27

If you increase the vault what happens to the lens?

Answer 27

Tighter fit

Question 28

If you decrease the vault of a CL what happens?

Answer 28

Looser fit

Question 29

What lens increases the edge thickness to a CL

Answer 29

Myoflange

Question 30

Central curve on the posterior lens surface. Expressed in radius of curvature or diopters

Answer 30

Base curve or CPC

Question 31

Chord diameter of the base curve.

Answer 31

Optical zone

Question 32

The shorter the radius the...

Answer 32

Steeper the curve

Question 33

What increases with shorter base curve?

Answer 33

Radius or larger optical zone diameter

Question 34

If you want to make a lens fit tighter u do?

Answer 34

Decrease base curve radius longer diameter

Question 35

Curve between the base curve and peripheral curve

Answer 35

Secondary or intermediate curve

Question 36

Outermost curve of the posterior surface of lens (longest curve)

Answer 36

Peripheral curve

Question 37

Blends junction between CPC, IPC, & PPC. Light medium or heavy

Answer 37

Blend curve

Question 38

Overall width from edge to edge in millimeters

Answer 38

Diameter

Question 39

Measure in mm at the geometric center

Answer 39

Center thickness

Question 40

What lens increases edge thickness for a plus lens

Answer 40

Myoflange

Question 41

What lens decreases edge of a high minus contact lens

Answer 41

Hyper flange

Question 42

Junction between anterior and posterior surface. Anterior zone posterior zone and apex

Answer 42

Lens edge

Question 43

Base down prism to control position movement specialty

Answer 43

Prism ballast (topic bifocal)lenses

Question 44

Removal of the inferior or superior portion of the lens for stabilization of specially lenses

Answer 44

Truncation

Question 45

The ____ along with the posterior optical zone size determine lens vault

Answer 45

BASE CURVE

Question 46

Soft lenses became readily available in the U.S in?

Answer 46

1971

Question 47

Which of the following materials would be representative of a soft lens?

Answer 47

Hydroxyethlmethacrylate

Question 48

Which individual is most responsible for the intro of a plastic corneal contact lens?

Answer 48

Tuohy

Question 49

Which individual is most responsible for the intro of a soft contact lens?

Answer 49

Wichterle

Question 50

Which type of rigid lens would be used to solve fitting problems created by excessive corneal astigmatism?

Answer 50

Bitoric

Question 51

Truncation is used to stabilize _____ lenses

Answer 51

Bifocal

Question 52

A flat curve will have a ___ radius of a curvature than a steep curve

Answer 52

Longer

Question 53

_____ developed the first contact lens for use in keratoconus patients

Answer 53

Kalt

Question 54

The keratometer is designed to measure the cornea at the

Answer 54

Visual center

Question 55

The topographer does what?

Answer 55

Provides a computer generated map of corneal curvature

Question 56

The area of the cornea with the steepest curvature is the ___

Answer 56

Apex

Question 57

Which of the following slit lamp illuminations is best to view the endothelium?

Answer 57

Specular reflection