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Z. Contact Lenses — Class Final > GP Review (JC) > Flashcards

GP Review (JC) Flashcards

1
Q

In what ways do RGPs offer better quality vision, compared to SCL?

A
  1. Masks corneal surface irregularity
  2. Masks corneal toricity
  3. Less deposits
  4. Increase clarity for treating presbyopia
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2
Q

In what ways do RGPs offer better ocular health, compared to SCL?

A
  1. Lower rate of IK
  2. Improved dry eye tolerance
  3. May stop myopia progression
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3
Q

What are the limitations of RGPS (vs. SCL)?

A
  1. Less initial comfort
  2. Increased susceptibility to dust/debris
  3. Lens loss more likely
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4
Q

Vast majority of RGPs are in what modern material?

A

FSA

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5
Q

Name the different surface treatments options

A
  1. Plasma
  2. HydraPeg
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6
Q

What solutions can be used with HydraPeg?

A
  1. ClearCare
  2. Simplus
  3. Tangible Clean/Boost
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7
Q

High or Low DK better: Hyperopia

A

High

(Due to lens thickness)

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8
Q

High or Low DK better: PKP

A

High DK

(Important to mitigate risk in high risk patients)

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9
Q

High or Low DK better: High Astigmatism (> 2.00 D)

A

Low DK

(to decrease flexure —> increase stability required for toric fit)

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10
Q

High or Low DK better: High Astigmatism (> 2.00 D)

A

Low DK

(to decrease flexure —> increase stability required for toric fit)

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11
Q

High or Low DK better: Dry Eye

A

Low

(Increase wettability)

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12
Q

Fitting Considerations (7)

A
  1. Motivation
  2. Sensitivity
  3. RE
  4. Topo
  5. Desired wear schedule
  6. Use environment
  7. Child w/ corneal scar
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13
Q

BC refers to the curvature of ____

A

Optic Zone

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14
Q

Secondary Curve (SC) is also known as the ___

A

Intermediate Curve

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15
Q

In a good fit, what should be avoided?

A

Apical touch and tight/excessively loose edges

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16
Q

In a good fit, where should the CL land? Why?

A

On mid-peripheral cornea; allows for tear exchange

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17
Q

In a good fit, where should the CL be centered? Why?

A

Over visual axis; to avoid glare

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18
Q

Empirical fit is based on ___ (3)

A
  1. MR
  2. Topo
  3. Lid position/condition
19
Q

For what design is empirical fit a good choice?

A

Back surface toric

20
Q

What is the first step in basic fitting?

A

Choose a philosophy

21
Q

A tight eyelid will ____ the lens

A

Displace

22
Q

A loose eyelid will ___ the lens

A

Struggle to hold the lens

23
Q

Clinical Pearl
What is a good way to determine whether a pt may not lid attach?

A

Difficult to flip lids

24
Q

In an interpalpebral lid interaction, what determines the lens position?

A

Corneal apex

25
Q

In an interpalpebral lid interaction, the lens will be ___ (larger/smaller) and ___ (flatter/steeper).

A

Smaller and steeper (< 9.2 mm)

26
Q

In a lid attachment, the lens will be ___ (larger/smaller) and ___ (flatter/steeper).

A

Larger and flatter (> 9.5 mm)

27
Q

Ina lid attachment, what problems are common with the lens?

A

Dropping

28
Q

Which fit is usually more comfortable: larger/flatter or smaller/steeper?

A

Smaller & steeper

29
Q

OAD varies from ___ to ___ mm

A

8 to 11 mm

30
Q

Considerations for choosing an OAD (5)

A
  1. Philosophy
  2. Pupil size
  3. Centration
  4. OZD
  5. Corneal size
31
Q

T/F: An anesthetic should be used during first insertion.

A

TRUE, but pt should be prepared for lens awareness

32
Q

Choosing a Curve (chart)

A
33
Q

T/F: anesthetic should be used during I/R

A

FALSE; won’t know if injures eye

34
Q

How long should an RGP settle before assessing with NaFL?

A

2-3 min

35
Q

Re: Anesthetics
No more than __ drops in a 30 min period

A

3

36
Q

Evaluation of RGP, post-blink: movement should be ___, ___, ___, and of ___ speed.

A
  • 1.5-2 mm
  • smooth
  • vertical
  • medium speed
37
Q

When evaluating lens with lids in normal position, the lens should ___ when the lid move

A

Remain in Limbal area

38
Q

When evaluating the lens with lids held apart, how should the lens act when pulled to top of cornea?

A

Drop slowly

39
Q

When evaluating the lens with lids held apart, how would a flat fitting lens act?

A

Drops quickly and often in a curved path, as it pivots around apex

40
Q

When evaluating the lens with lids held apart, how would a steep fitting lens act?

A

Falls slow and remains on apex

41
Q

What happens if not enough NaFL is instilled, when evaluating CL?

A

Falsely appears aligned

42
Q

What happens if too much NaFL is instilled, when evaluating CL?

A

Obscures Fluorescein pattern

43
Q

What is the purpose of the Wratten #12 yellow filter?

A

Enhance view by eliminating unwanted wavelengths

44
Q

In a steep fit, a smaller central NaFL pool indicates a ___ (very/slightly) tight lens.

A

Very

Z. Contact Lenses — Class Final (1 decks)

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