Accommmodation

Question 1

Hofstetter’s formula

Answer 1

25-0.4age = max
18.5 - 0.3age = avg
15 - 0.25age = min

Question 2

Accomm insufficiency

Answer 2

AoA < min accom
Blurred vision/frontal HAs
Near xop -> eso if Px tries exert more accom
Tx: hyperopic rx/low add
Pen-nose exercise

Question 3

Accomm fatigue

Answer 3

Similar Sx to AI but more transient

Question 4

Accom spasm

Answer 4

Accom excess
Constant ciliary contraction
Causes: Uncorrected hyperopia / prolonged near work/brain lesions/MS/meningitis/head trauma
Sx: pseudomyopia/HAs/ocular discomfort/SOT/miosis
Tx: gradual hyperopia correction
Orthotic exercises

Question 5

Accom inertia

Answer 5

More common 30+yo

Difficult switching from DV-NV-DV