Geometric Optics
Figure 1-1 Rectilinear propagation of light through uniform medium. Here, the speed of light is constant with spherical wavefronts and straight rays. Note that in nonuniform medium, the speed of…
Clinical Refraction
Figure 3-1 Observation system: light path from patient’s pupil, through mirror, to observer’s retina. (Illustration by C. H. Wooley.) Figure 3-2 Illumination system: position of source (S) with plano mirror…
Optical Instruments and Low Vision Aids
Figure 7-1 A plus lens used to view an object positioned in the focal plane of the lens. O = object; f = focal length. (Redrawn from Basic and Clinical…
Physical Optics
Figure 8-1 Sunlight passing through openings between partially overlapping leaves suggests that light moves in straight lines. However, such “rays” would be invisible without light scattering caused by mist in…
Intraocular Lenses
Figure 5-1 The major types of intraocular lenses (IOLs) and optics. A, Anterior chamber lens. B, Prepupillary lens (no longer used). C, Posterior chamber lens in the capsular bag. D,…
Contact Lenses
Figure 4-1 Contact lens. Note the relationship among the parts. (Modified with permission from Stein HA, Freeman MI, Stein RM. CLAO Residents Contact Lens Curriculum Manual. New Orleans: Contact Lens Association…
Optical Considerations in Keratorefractive Surgery
Figure 6-1 An example of meridional (tangential, left) and axial (right) maps of a normal cornea. (Used with permission from Roberts C. Corneal topography. In: Azar DT, ed. Gatinel D,…
