Dry eye in CLs

Question 1

Role of the tear film

Answer 1

• antibacterial
• optical performance of the eye
• transports nutrients
• successful CL wear

Question 2

Dry Eye

Answer 2

Symptoms:
- grittiness
- FB sensation
- itchiness
- blurred vision
- lacrimation

Signs:
- reduced TBUT
- reduced tear volume (TMH)
- hyperaemia
- possible bleph
- cornea/conj staining

Question 3

Causes of DED in CL

Answer 3

• reduced blink efficiency
• material dehydration
• rule out poor fitting
• increased risk of infection

Question 4

Effect of CL on tear film

Answer 4

• destabilisation
• reduced TBUT
• reduced tear film
• incomplete blink
• lid conformance
• tear stagnation

Question 5

Mangament in SCL

Answer 5

Aim to reduce tear evaporation
- material
- lubrication
- water content
- wear schedule
- preservative free products
- refit with RGPs
- more frequent replacement

Question 6

Management in RGP

Answer 6

Minimise staining
- centrations
- TD
- edge thickness
- avoid preservatives
- choose lens with wetting + lubrication incorporation

Question 7

Preventing dry eye in CLs

Answer 7

• identifying borderline px
• treating conditions in advance (bleph)
• tear supplements
• punctual plug
• lens replacement
• reduce CL WT