Week 5 - Color Lenses, & Extended Wear Flashcards
Do NOT assume the people in case study examples are lying. T/F
TRUE
What are handling tints?
these are tints added to a normal cl so they can be seen if dropped
What are handling tints also known as? 2
‘lens visibility tints’
‘locator tints’
What does a cosmetic tint do?
designed to beautify an otherwise normal appearance
What are prosthetic tinted lens meant to do?
to normalize an otherwise
abnormal appearance.
How does a Performance Enhanced Tinted Lens work?
enhancing contrast between objects like ball and the environment
What is the purpose of prophylactic tints?
To prevent injury or disease of the eye
What is the purpose of a theatric tinted lens?
Create dramatic or theatrical effects. (Halloween)
What is the purpose of a therapeutic tinted lens?
A lens that is designed to treat an underlying defect or disease.
How do prophylactic tints protect the eye? 3
- Protection from excessive UV light
- Use photosensitizing drugs
- Exposed to artificial UV source
Who do prophylactic tints help? 2
- Outdoor lifestyle/exposed to high levels of UV
- Aphakic px
How can therapeutic tinted lenses help someone with andiridia or other pupil anomalies?
by reducing excessive photophobia and glare
What are the 3 types of cosmetic tints?
enchanched tints
opaque tints
combination tints
Why is frequently replacing extended wear lenses beneficial and increase EW success?
restricts exposure of the eye to accumulated
aged or denatured protein build ups by controlling the deposit build up
What can accumulated aged or denatured protein on an extended wear lens cause (conditions 2)?
-contact lens pappilary conjunctivitis (CLPC)/(GPC)
-infiltrative keratitis.
What are the 3 types of prosthetic tinted lenses?
-Painted iris and clear pupil
-painted iris and opaque pupil
-clear iris and opaque pupil
Who benefits from a prosthetic tinted lens that is a painted iris and clear pupil?
sighted eye with a disfigured iris
Who benefits from a prosthetic tinted lens that is a painted iris and opaque pupil?
a nonsighted eye
Who benefits from a prosthetic tinted lens that is a clear iris and opaque pupil?
a nonsighted eye with a dense cataract
What are 4 common conditions that can arise from extended wear cls? 4
-corneal hypoxia
-Capillary conjunctivitis
-Microbial conjunctivitis
-Infiltrate keratitis
What symptoms can be a sign of adverse effects of extended wear cls? 5
-redness/ inflammation
-decrease in vision
-unusual discharge
-pain/discomfort
-photophobia
What are the 5 different categories of wearing schedules?
-frequent replacement lenses
-flexible lenses
-extended wear lenses
-continous wear lenses
-disposable lenses
What are frequent replacement lenses?
they are regular replacement of soft cls at a predetermined interval every 1 to 3 months
What is an advantages of frequent replacement lenses?
less portein deposits and debris which reduces the risk of inflammation and infection
What are flexible lenses?
intermittent use of cls overnight or during sleep
Who are flexible wear lenses suitable for?
people who need to sleep in their lenses every so often but not all the time
What are extended wear lenses?
regular use of cls overnight or during sleep for periods of up to 1 month
Who are extended wear lenses suitable for?
pxs who prefer to not remove lenses every night
What are continous wear lenses?
use of cls without the removable of periods exceding 1 month
Why are continous wear lenses uncommon? 2
high risk of microbial keratitis
high risk corneal hypoxia
What are disposable lenses(most common)?
-soft lenses designed for single use or short term tear
What are the different types of disposable lenses? 4
-daily disposable
-weekly disposable
-biweekly/fortnighly disposable
-monthly disposable
