Modality of wear

Question 1

Different types of wear modality

Answer 1

• Daily wear
• Extended wear (day + night up to a week with night off)
• Flexible wear (occasional evening wear
• continuous (day + night for a month)
• planned ( overnight wear for 30 days)
• sporadic wear (unplanned occasional wear, possibly 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

• reduces spoliation
• reduced papillary conjunctivitis
• reduced infections
• improved comfort
• safer EW
• low replacement cost
• reduced cleaning time
• easy fitting
• favourable for px
• easy to change Rx
• established link to practice

Question 5

Advantages + Disadvantages of daily disposables

Answer 5

ADVANTAGES
- reduces risk of infection
- more convenient
- good for young px
- good for occasional wear
- reduced risk of mechanical complications

DISADVANTAGES
- limited Rx range
- more costly
- tricky handling due to thinness

Question 6

Advantages + Disadvantages of 2/4 weekly

Answer 6

ADVANTAGES
- wider range of Rx
- reduced cost
- easier handling

DISADVANTAGES
- less conventient
- reduced comfort at end of life span
- cleaning regime
- higher risk of infection
- cost if gets lost

Question 7

SCL > 1 month

Answer 7

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

Question 8

Advantage + Disadvantage of RGP

Answer 8

ADVANTAGES
- most cost efficient
- good tear exchange
- don’t cover whole corneal surface
- wide Rx range
- good quality of vision
- tints available

DISADVANTAGES
- discomfort
- adaptation time
- easy to loose as small
- FB trapped underneath
- breakage

Question 9

Factors to choosing a wear modality

Answer 9

Frequency of wear
- daily, part time, sports etc

Replacement schedule
- cost, convenience

Px management
- frequent replacement = reduced complications
- compliance

Question 10

Daily wear vs Extended wear considerations

Answer 10

• corneal status
• risk factors
• Rx
• lid integrity
• tear film
• environmental factors
• individual characteristics
• px risk factors for corneal infiltrates