Week 13 Flashcards
Muscles that contract and relax during accommodation to view objects of varying distances
Cilia
Normal loss of near focussing that happens with age
Presbyopia.
What happens to the cilia muscles and suspensory ligament during presbyopia
Cilia muscles and suspensory ligament loose elasticity during presbyopia (difficulty with near vision)
What happens to the LENS during presbyopia?
Gradual loss of accommodation –becomes less flexible, so doesn’t change shape as easily. Important during reading
Holds lens and supports eye
suspensory ligament
What happens to the lens with age?
The lens looses flexibility with age.
What is the most common complaint with presbyopia
Arms aren’t long enough to hold out reading material (difficulty with near vision)
When does presbyopia usually happen in individuals?
May start happening about age 40-50
What is the outlook once someone has developed presbyopia ?
Progressive–worsens over time
Build up of lens leading to symptoms including cloudiness and bluriness
Cataracts
All of the following except which are symptoms of cataracts? A. Cloudiness B. Blurriness C. Bright colors D. Halos of Light
C. Bright colors. With cataracts, colors are faded
What happens after cataracts are corrected via surgery?
Person has twinkle/flicker in eye. Can usually see
T/F: Cataract surgery is very expensive and usually not covered by insurance
False. Cataract surgery should be covered, even for lower income
Age-related condition that causes central vision loss
Age-related macular Degeneration
What is the Macula important for?
Macula is crucial for central vision and seeing details sharply; activities requiring precise vision e.g., reading, sewing, driving, setting oven temperature
Part of middle eye responsible for detailed vision
Fovea
One of the leading causes of irreversible blindness…
Age-related macular degeneration
Prognosis for age-related macular degeneration?
Irreversible. One of leading causes of irreversible blindness
Genetics, exposure to the sun, and nutritional deficits are all causes of…?
Macular degeneration
Dry vs. Wet macular degeration
Dry: Insidious, creeps up slowly
-White/yellow deposits of fatty protein
-Fuzzy vision
Wet: Growth of abnormal blood vessels
-See straight lines as wavy (problem when driving, going down/up stairs)
-White out or dark outs in central vision
-Bluriness
-Where trying to focus is completely obscured
Main problems with dry macular degeneration
-Fuzzy vision
Main problems with wet macular degeneration
- Blurry vision
- See straight lines as wavy b/c abnormal blood vessel growth and leakage of fluid in eye SO
- Problem with driving, going up/down stairs
- White outs/black outs
- Where trying to focus is obscured
- Social participation affected–can’t see nonverbal cues during conversation
- distressing for life-long readers
Functional impact of macular degeneration?
- Reading
- Driving
- Safety
- Falls
Most common cause of blindness in African Americans
Glaucoma