Prism Diopter & Degree Converter
Strabismus & Ocular Motility

Prism Diopter & Degree Converter

Convert between angle of deviation in degrees and prism diopters.

Degrees → Prism Diopters

PD = 100 × tan(θ)
°
Prism Diopters
Δ

Prism Diopters → Degrees

θ = atan(PD / 100)
Δ
Angle of Deviation
°
For clinical reference only. Values are rounded to the nearest whole unit.