DSA

Constant Unilateral strabismus at distance AND near with an onset before age 7

• Expected VA: 20/40-20/100
• can be worse

uncorrected high unilateral RE that is present in early life

VA: 20/80 or better

Anisometropia

• Astigmatism >1.5D
• Hyperopia >1.0D
• Myopia >3.0D

Isometropia

• Astigmatism >2.50D
• Hyperopia >5.00D
• Myopia >8.00D

• -Significant bilateral RE
• -issues with high myopes

expected VA: 20/30-20/70

obl>AR>WR

Organic - irreversible by tx structural changes such as undetected retinal damage

Idopathic - responds to tx but then regresses

• Hysterical - va loss due to emotion
• 8-14 y/o females
• Bilateral VA loss 20/70-20/200
• tubular field

usually found in strabismic amblyopes and uncommon in anismetropic amblyopes (unsteady central fixation)

• Further apart in upgaze
• closer in down gaze

• Closer in upgaze
• further in downgaze

• further in upgaze
• closer in down gaze

worse: upgaze

most common

• further in upgaze
• closer in down gaze

worse: down gaze

• closer in upgaze
• further in downgaze

worse: downgaze

• closer in upgaze
• further in downgaze

worse: upgaze

YES!

because closer in upgaze, further in downgaze

worse: downgaze

wont be able to walk down stairs

point their nose towards deficit where eye cant go

head tilt help prevent amblyopia

are longstanding functional condition

• Primary gaze: SR and IO = elevate
• Right gaze: RSR only elevates, IO = extort
• Left gaze: RIO elevates only