Which methods can clinicians use to assess dry eye signs before fitting soft lenses?

Which methods can clinicians use to assess dry eye signs before fitting soft lenses?

• A. Use patient questionnaires
• B. Use patient questionnaires, TBUT, ocular surface staining, Schirmer test, and evaluate tear film quality
• C. Intraocular pressure measurement
• D. Visual acuity assessment

Answer: (B)

Assessing dry eye signs before fitting soft lenses relies on combining how the patient feels with what you observe on the ocular surface. A questionnaire captures symptoms like dryness, grittiness, or fluctuating vision, but symptoms don’t always match surface health, so you need objective checks too. Tear break-up time measures how long the tear film stays stable after a blink; a short break-up time signals tear film instability that can cause lens discharge, reduced comfort, and fluctuating vision. Ocular surface staining with fluorescein or lissamine green shows where the corneal or conjunctival epithelium is compromised, indicating surface irritation or damage that lenses could worsen. The Schirmer test gauges tear production, helping identify aqueous-deficient dryness that might affect lens wear duration and comfort. Evaluating tear film quality encompasses aspects of the tear layer and meibomian gland function, which influence tear film stability and lubrication.

Together, these tests give a fuller picture of both symptoms and the actual tear film and surface health, which is essential for predicting how well a patient will tolerate soft lenses. Intraocular pressure measurement and visual acuity alone don’t reveal tear film status or ocular surface integrity relevant to lens fitting, so they don’t substitute for a thorough dry eye assessment.