Unit 3: Still OTC And Contact Lenses Flashcards
Mucin
Innermost layer
-produced by epithelial cells of cornea and conjunctiva
-provides avascular cornea with nourishment
Aqueous (tear layer)
Middle layer
-produced by lacrimal gland
-lubricates and prevents infection
-thickest part of tear layer
Lipid
Top of tear layer
-produced by meibomian gland
-seals tear film and reduces evaporation
Causes of dry eye disease
-aging
-medications
-digital devices
-environment
-contact lenses
-LASIK surgery
-meibomian gland dysfunction (MGD)
-blepharitis
-reduced aqueous production
Meibomian gland dysfunction
-thickened meibomium
-poor/thin lipid layer
-tear evaporation
Treatments for MGD
-hot compress (frequently)
-expression of meiobian glands
-Omega-3 supplements
-Artificial tears
-Medications
-Lipiflow (machine that heats and pulsates to liquefy meibum and massage to push it out of clogged glands)
Blepharitis (and causes)
Inflammation of skin around the eyelashes
-staphylococcus bacteria, blocked oil glands, hormone problems, allergies, mites (ew)
Treatment of blepharitis
-hot compress
-lid scrubs
-artificial tears
Blepharitis symptoms
-Swollen, itchy, scaly
-Blurred vision
-Watery eyes
-Gritty sensation
Types of contact lenses
-soft
-hard/gas-permeable
-specialty
Kinds of soft contact lenses
-daily wear
-Extended wear
-Disposable wear
-Cosmetic or decorative
-Toric
-Bifocal or multifocal
Why wear hard contact lenses?
Gives better vision
Hybrid lenses
-Soft on edge
-Hard in the middle
-best of both
Sclera lenses
-wider
-Sits on the white part of the eye to avoid touching cornea
-for keratoconus and other corneal issues
Multi purpose solution
For cleaning and storing most soft contact lenses
