Foundations of Ophthalmic Lens Power

Course overview

2. FOUNDATION OF OPHTHALMIC LENS POWER covers the following three areas: 1) Focal Length of a Spectacle Lens: defines focal length and explains the relationship between focal length and dioptric power. This course also provides different examples of how to calculate focal length. 2) Vertex Distance and Vertex Compensation: explains the concept of vertex compensation and how to consider this factor when fitting a patient's eye wear. explains the concept of vertex compensation and how to consider this factor when fitting a patient's eye wear 3) Magnification and Spectacle Lenses: explains how unbalanced magnification in lenses can create vision problems. It also identifies key elements of magnification and how to use a knowledge of these elements to balance magnification in a lens.