2020calcs is a website made to help eye care professionals with quick
chairside tools and resources. It is 100% free and always will be.
Update Log
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July 2026 — Added Vision Simulators, ICD-10
references, Rx Analyzer, LARS Calculator, Spherical Equivalent
calculator, printable charts (Eye Exam Paper Chart, Contact Lens
Evaluation, combined Eye Exam/CL Evaluation).
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June 2026 — Cosmetic update, added "Base Curve" and
"Amplitude of Accommodation" calculators.
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May 2026 — Added "Retinoscopy Calculator", created
"Printable Resources" section and added Amsler Grids (3).
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