Modality Of Wear

Question 1

Different types of wear modality

Answer 1

• Daily wear
• extended wear (day and night up to a week with a night off)
• flexible wear ~ occasional evening wear
• continuous ~ day and night for a month
• planned ~ overnight wear for 30 days
• sporadic wear ~ unplanned occasional wear, possible overnight

Question 2

SCL Replacement schedule durations

Answer 2

• daily
• 2/4 week disposable
• monthlies
• 3/6 months

Question 3

Why replace CLs

Answer 3

Reduces complications
- reduced O2 permeability
- drying out
- microbes
- papillary conjunctivitis
- infections

Simplifies cleaning
- no protein removal
- reduces non compliance

Loss of stability
Improve comfort
Deposits reduce comfort

Question 4

Advantages of frequently replaced CLs

Answer 4

• reduced spoliation
• reduced papillary conjunctivitis
• reduced infections
• improved comfort
• safer extended wear
• low replacement cost
• reduced time cleaning
• easy fitting
• favourable for Px
• easy to change Rx
• establishes link to practice

Question 5

Advantages of daily disposables

Answer 5

• reduced risk of infections
• more convenient
• good for young Px
• good for occasional wear
• reduced risk of mechanical complications

Question 6

Disadvantages of Daily disposables

Answer 6

• limited Rx range
• cost
• tricky handling
• thinner

Question 7

Advantages of 2/4 weekly

Answer 7

• easy handling
• reduced cost
• easier to handle
• wider range of Rx

Question 8

Disadvantages of 2/4 weekly

Answer 8

• less convenient
• reduced comfort at end of life span
• cleaning regime
• higher risk of infection
• cost if get lost

Question 9

SCL over 1 month

Answer 9

• 3,6,12 months
• higher risk of infection and complications
• reduced comfort
• protein removers likely
• expensive if lost

Question 10

RGP advantages

Answer 10

• most cost efficient
• good tear exchange
• wide Rx range
• tints available
• good quality of vision
• not cover whole corneal surface

Question 11

RGP disadvantages

Answer 11

• discomfort
• adaptation time
• easy to lose as small
• foreign bodies trapped underneath
• breakage

Question 12

Factors to choosing a wear modality

Answer 12

Frequency of wear
- daily, part time, sports etc

Replacement schedule
- cost
- convenience

Px management
- frequent replacement = reduced complications
- compliance

Question 13

Daily wear vs extended wear considerations

Answer 13

• corneal status
• risk factors
• prescription
• lid integrity
• tear film
• environmental factors
• individual characteristics
• Px risk factors for corneal infiltrates