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) Vision Correction Last Update: January 11, 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 Refractive Vision Error Corrective Procedures Conclusion Introduction This article reviews the four types of vision impairment caused
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) Eye Anatomy Last Update: December 23, 2024 Introduction Eye Schematics Cornea Sclera Limbus Aqueous Humor Iris / Ciliary Body / Choroid Conjuctiva Lens Vitreous Humor Hyaloid Canal Retina Conclusion Introduction In this post on the Anatomy of the Eye, I provide some useful cross sectional (sagittal) and frontal schematics of the eye
Menu (linked Index) Eye Lens Anatomy and Accommodation Last Update: December 22, 2024 Introduction Lens Anatomy Cataract Surgery Impact on the Lens Lens Accommodation Conclusion Introduction After my cataract surgery in 2024, I decided to write an article on the experience. The effort spawned a few more articles on the anatomy and physics of the
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 used in some of
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Introduction Electro-Magnetic Radiation Last Update: October 20, 2024 This post is a brief refresher on Electro-Magnetic Radiation (i.e. light). See my other posts where light plays a critical role. A Color Primer (Including How to Create an Effective Colour Palette) Electro-Magnetic Radiation The human visible spectrum of light represents a small section of the full
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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 post on Snell’s Law. Here are a few videos
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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. Return to Menu Snell’s Law Application Example Let’s use Snell’s Refraction equation, n2sinθr = n1sinθi , to determine the refracted light line angle based on other known values. the
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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. Return
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