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OPT 2500 > Midterm > Flashcards

Midterm Flashcards

1
Q

What does rose Bengal do

A

Stains devitalized cells

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2
Q

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

A

Optic section

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3
Q

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

A

Diffuse

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4
Q

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

A

Red free

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5
Q

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

A

Direct focal parallelpiped

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6
Q

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

A

Indirect

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7
Q

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

A

Cobalt

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8
Q

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

A

Speculation reflection

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9
Q

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

A

Sclerotic scatter

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10
Q

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

A

Leonardo da Vinci

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11
Q

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

A

Thomas young

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12
Q

Who fitted for fitted glass shell in 1887?

A

F.A Muller

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13
Q

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

A

A.E Fick

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14
Q

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

A

Leonardo da Vinci

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15
Q

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

A

Thomas young

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16
Q

Who fitted for fitted glass shell in 1887?

A

F.A Muller

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17
Q

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

A

A.E Fick

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18
Q

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

A

Leonardo da Vinci

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19
Q

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

A

Thomas young

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20
Q

Who fitted for fitted glass shell in 1887?

A

F.A Muller

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21
Q

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

A

A.E Fick

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22
Q

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

A

Mullen & Obrig

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23
Q

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

A

Mullen & Obrig

24
Q

When does FDA classify a soft lens as a drug?

A

1968

25
Q

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

A

Theodore Obrig

26
Q

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

A

1987

27
Q

If you increase the vault what happens to the lens?

A

Tighter fit

28
Q

If you decrease the vault of a CL what happens?

A

Looser fit

29
Q

What lens increases the edge thickness to a CL

A

Myoflange

30
Q

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

A

Base curve or CPC

31
Q

Chord diameter of the base curve.

A

Optical zone

32
Q

The shorter the radius the…

A

Steeper the curve

33
Q

What increases with shorter base curve?

A

Radius or larger optical zone diameter

34
Q

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

A

Decrease base curve radius longer diameter

35
Q

Curve between the base curve and peripheral curve

A

Secondary or intermediate curve

36
Q

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

A

Peripheral curve

37
Q

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

A

Blend curve

38
Q

Overall width from edge to edge in millimeters

A

Diameter

39
Q

Measure in mm at the geometric center

A

Center thickness

40
Q

What lens increases edge thickness for a plus lens

A

Myoflange

41
Q

What lens decreases edge of a high minus contact lens

A

Hyper flange

42
Q

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

A

Lens edge

43
Q

Base down prism to control position movement specialty

A

Prism ballast (topic bifocal)lenses

44
Q

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

A

Truncation

45
Q

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

A

BASE CURVE

46
Q

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

A

1971

47
Q

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

A

Hydroxyethlmethacrylate

48
Q

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

A

Tuohy

49
Q

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

A

Wichterle

50
Q

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

A

Bitoric

51
Q

Truncation is used to stabilize _____ lenses

A

Bifocal

52
Q

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

A

Longer

53
Q

_____ developed the first contact lens for use in keratoconus patients

A

Kalt

54
Q

The keratometer is designed to measure the cornea at the

A

Visual center

55
Q

The topographer does what?

A

Provides a computer generated map of corneal curvature

56
Q

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

A

Apex

57
Q

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

A

Specular reflection

OPT 2500 (2 decks)

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