Eye Tests
Worth 4 Dot Test
Assess fusion and suppression.
Maddox Rod Test
Measure latent deviations (phoria).
Amsler Grid Test
Central vision assessment for macula.
Astigmatic Fan Test
Refine astigmatism axis and power.
Duochrome Test
Check for spherical refractive error.
Near Vision Test
Near acuity and reading assessment.
Distance Vision Test
Standard far visual acuity check.
Ophthalmic Calculators
Simple Transposition
Convert Rx between Plus/Minus cylinder.
CL Power Converter
Spectacle Rx to contact lens power.
Corneal Curvature Converter
Diopters to radius (mm) conversion.
Amplitude of Accomodation (AOA)
Calculate maximum accommodative effort.
Vision Chart Converter
Convert VA notations (Snellen, LogMAR).
Focal Length of Lens
Determine focal length from lens power.
Age to Near Power Addition
Estimate presbyopic add power by age.
Retinoscopy Power Calculator
Adjust retinoscopy findings for working distance.
Spherical Equivalent
Single sphere value representing Rx.
IOL Power Calculator
Intraocular Lens calculation for cataract surgery.
BMI Calculator
General health indicator (Body Mass Index).