Contact Lens Practice Review

Flashcards created to reinforce key concepts and definitions related to contact lens practice.

What is the primary purpose of performing slit lamp checks in contact lens practice?

To assess the health of the eye, evaluate the fit of contact lenses, and check for any potential complications.

What should be checked first during a slit lamp routine?

Start with the external eye, examining the lids and lashes.

What is blepharitis?

Blepharitis is inflammation of the edge of the eyelids.

What does the term 'limbal hyperaemia' indicate?

It indicates increased blood flow to the limbus, potentially signaling irritation or disease.

What is the difference between 'with the rule' and 'against the rule' astigmatism?

With the rule astigmatism has the steeper meridian along the vertical axis, while against the rule has it along the horizontal axis.

Which instrument is commonly used to measure corneal radius of curvature?

Keratometer.

What are the advantages of soft contact lenses?

More comfortable, easier to handle, and less likely to dislodge.

What are some disadvantages of rigid gas permeable (RGP) lenses?

Can cause flare or halo effects, may lead to corneal warpage, and can be dislodged more easily than soft lenses.

What factors affect oxygen getting to the cornea?

Lens permeability, thickness, tear pump effects, and lens deposits.

What is a 'trial lens' in contact lens fitting?

A lens used to assess fit and vision before finalizing the prescription.

What should be included in initial patient discussions for contact lens fitting?

Patient's goals, previous lens history, hygiene practices, general health, and preferences.

What is the recommended follow-up period for the first aftercare appointment post-contact lens fitting?

2-3 weeks after fitting.

What are some signs of a loose-fitting contact lens?

Excessive movement, poor centration, and lens awareness.

How can contact lens hygiene be summarized?

Regular hand washing, proper lens cleaning and storing, and replacing solutions and cases.

What is the role of fluorescein in slit lamp examinations?

To detect epithelial defects and assess the fit of contact lenses.

When are lenses typically discarded after use?

Daily disposable lenses should be discarded after each wear.

What legal information must be included in a contact lens specification?

Patient's name, address, DoB (if under 16), practice's details, practitioner's information, fitting date, lens details, and expiry date for aftercare.

What is the main complication associated with incorrect contact lens fit?

Hypoxia leading to corneal edema and other ocular complications.

What is Acanthamoeba keratitis?

A serious eye infection caused by a free-living amoeba, often associated with contact lens wear.

Why are regular check-ups important for contact lens wearers?

To monitor eye health, ensure proper fit, and manage any complications.

What measures can be taken to improve compliance with contact lens regimens?

Education, demonstrations, and written instructions on lens care and hygiene.

What must a patient do before applying contact lenses after handling makeup?

They should apply their lenses before putting on makeup, and remove the lenses before removing makeup.