Menu (linked Index) Refractive Geometric Optics Last Update: December 26, 2024 Introduction Optics Defined Ray Theory The Law of Refraction Why Light Slows Down Lenses Convex and Concave Lenses Ray Diagrams Ray Diagrams (Converging Lens) Ray Diagrams (Diverging Lens) The Eye acts as a Converging Lens Lens Magnification Equation Thin Lens Equation Lens Maker’s Formula […]
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Menu (linked Index) Lens Ray Diagrams Last Update: October 21, 2024 Introduction Convex and Concave Lens Basics Ray Diagram Drawing Rules Convex and Concave Lens Ray Diagram (O>2F) Convex and Concave Lens Ray Diagram (O=2F) Convex and Concave Lens Ray Diagram (2F>O>F) Convex and Concave Lens Ray Diagram (O=F) Convex and Concave Lens Ray Diagram
Menu (linked Index) Lens Equations Last Update: October 21, 2024 Introduction Symmetrical Concave and Convex Lens Using Ray Diagrams to Determine the Lens Equations Lens Magnification Equation Thin Lens Equation Curved Surface Refraction Equation Derivation Lens Maker’s Equation Introduction In this post we’ll derive the following key lens equations: The Lens Magnification Equation The Thin
Introduction Snell’s Law (Law of Refraction) Example Last Update: October 20, 2024 This post provides an example of how to compute refracted light angles using Snell’s Law. Refer to my post Refractive Geometric Optics for more on Snell’s Law. Also, Find more links related to my eye research here: Understand Your Eyes. Return to Menu Snell’s
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Introduction Light Refraction Tank Analogy Last Update: October 20,2024 This post provides a useful analogy for the bending and slowing of light rays when light is refracted from a lower refractive medium (e.g. air) to a higher refractive medium (e.g. glass or water). Also see my posts: Snell’s Law. Refractive Geometric Optics and Understand Your
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Menu (linked Index) Wave Superposition Last Update: October 20, 2024 Introduction Electromagnetic Wave Superposition Why Light Slows Down Introduction Electromagnetic waves produced by different sources will combine in a process called superposition. In this post, we’ll describe basic wave superposition and why light slows down when entering a medium with a higher refractive index. Also
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Menu (linked Index) Vision Correction Last Update: Feb 5, 2025 Introduction Anatomy of the Eye Near Sightedness and Far Sightedness A Normal Eye with Perfect Vision Far Sightedness and Its Correction Presbyopia Near Sightedness and its Correction Astigmatism Eye Glass / Contact Prescription Refractive Vision Error Corrective Procedures for Near Sightedness, Far Sightedness, Presbyopia, and
Menu (linked Index) Cataract Surgery : From Darkness, Light Last Update: February 9, 2025 Introduction What are Cataracts? Couching for Cataracts History of Cataract Surgical Procedures Characteristics of a Modern Cataract Surgery Pre-Cataract Surgery Homework A Modern Cataract Procedure Conclusion Also refer to my post: Understand Your Eyes where you can link to other eye and optics
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Menu (linked Index) Cataract Tabulated History Last Update: January 21, 2025 Introduction Cataract Historical Timeline Cataract References Introduction In this post I’ve created a (roughly) chronological tabulated history of cataract procedures and surgery developments through the ages. The first table is the historical listing, including a reference source number. The second table provided can then
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Menu (linked Index) Geometry and Trigonometry Rules Last Update: October 20, 2024 Introduction Triangle Drawings Similar Triangles Exterior and Interior Angles of Triangles Right Triangle Trigonometric Functions Small Angle Approximations Radius of Curvature Normal (Perpendicular) Line to Circle Surface Introduction This post summarizes some useful geometric and trigonometric functions and rules. These are used in
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