Introduction & CL routines

Question 1

True or False - Medication can cause dry eye

Answer 1

True - therefore it is important to have a good history and symptoms

Question 2

What are we assessing in regards to tears before we select a lens?

Answer 2

Tear quantity - via tear prism height

Tear quality - via TBUT

Question 3

What is the point of measuring tear prism height and TBUT?

Answer 3

It allows us to diffrentiate if any dry eye is caused by an inadequate volume of tears or an inability of the lipid part of the tear film to delay tear evaporation.

Question 4

Other than tear prism height and TBUT what other things would we want to look out for before fiting a px with contact lenses?

Answer 4

Signs of MGD, tear debris, hyperemia. Integrity of cornea via NaFL.

Question 5

What do we include in the advise section of a CL fit?

Answer 5

¡Address any concerns

¡Eye health

¡Lens suitability

¡Confirm Dos & Don’ts

¡Emergency advice

¡When you wish to review

• record that you stated ‘if an problems please come back in or go to your gp’

¡Give prescription, if appropriate, and any leaflets

Question 6

What sort of preliminary measurements would you take before fiting any type of CL?

Answer 6

Keratometry

HVID

VPA

PUPILS

Question 7

How would you follow up a symptom from contact lenses?

Answer 7

By asking:

WHEN the symptom occurs - at insertion , at end of the day, after removal , at end or behining of month?

ONSET - when did symptoms appear?

TRIGGERS - does it happen in particular environments? - office with air conditioning?

How is it resolved? Medication?

Severity? on a scale of one to ten.

Question 8

How do we pick a BC?

Answer 8

Generally we use the ACLM or fit 0.8mm flatter than the flattest K.

BC is the same as a back optic zone radius.