OPTICAL ABBREVIATIONS & GLOSSARY

OPTICAL ABBREVIATIONS 20/20 best vision ≈ approximate ∆ prism diopter º degree of prism < less than > greater than ↑ increase ↓ decrease ♀ female ♂ male combined with ∞ infinity + plus - minus “A” horizontal box measurement a applanation tension ac before meals acc accommodation ADD add power (multifocal) AR anti-reflective ... ................
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