Refractive Errors Flashcards
Tests visual acuity
Snellen’s chart
Order of testing the eyes (pagkasunod sunod ng eyes na itetest)
Right eye — Left eye —Both eyes
Normal acuity of the eyes
20/20
Numerator (physical distance)
Denominator (reference point)
Legal blindness acuity score
20/200
How to approach the client with legal blindness?
Talk first before touching
Touching might startle the client
Ambulatory priority
Safety
Assisted
Who should be one step ahead when walking? Client or the nurse?
The nurse should be one step ahead
Client grips the nurse’s arm or elbow (kibing)
Device used to walk
Straight cane with white red tip
Sweep the floor
What pet is great for guide
Dog
Compensation for blindness
Substitute other senses
Blind people have strong ears or sense of touch
Refractive errors are problem in
Bending light
4 refractive errors
Myopia
Hyperopia
Astigmatism
Presbyopia
Myopia
Cause:
Sight (near or far):
Focus:
Refractive ability:
Corrective lens:
Surgical management:
Cause: Long
Sight (near or far): near sighted
Focus: Front
Refractive ability: Strong
Corrective lens: concave
Surgical management: LASIX
Hyperopia
Cause:
Sight (near or far):
Focus:
Refractive ability:
Corrective lens:
Surgical management:
Cause: short
Sight (near or far): Far sighted
Focus: Back of retina
Refractive ability: weak
Corrective lens: convex
Surgical management: LASIX
Astigmatism
Cause:
Sight (near or far):
Focus:
Refractive ability:
Corrective lens:
Surgical management:
Cause: irregular shape of lens
Sight (near or far): blurry both near and far
Focus: Front and Back of retina
Refractive ability: —
Corrective lens: Cylindrical
Surgical management: LASIX
Presbyopia
Cause:
Sight (near or far):
Focus:
Refractive ability:
Corrective lens:
Surgical management:
Cause:Aging/ old age
Sight (near or far): far sighted
Focus: Back of Retina
Refractive ability: weak
Corrective lens: bifocal/ progressive
Surgical management: —
