2020–2021 BCSC Basic and Clinical Science Course™
11 Lens and Cataract
Chapter 4: Embryology and Developmental Defects
Congenital Anomalies and Abnormalities
Mittendorf dot, mentioned earlier in this chapter, is a common anomaly observed in many healthy eyes. A small, dense white spot generally located inferonasal to the posterior pole of the lens, a Mittendorf dot is a remnant of the posterior pupillary membrane of the tunica vasculosa lentis (Fig 4-6). It marks the place where the hyaloid artery came into contact with the posterior surface of the lens in utero. Sometimes a Mittendorf dot is associated with a fibrous tail or remnant of the hyaloid artery that projects into the vitreous body.
Figure 4-5 Coloboma of the lens (arrow) as viewed by retroillumination.
Figure 4-6 Mittendorf dot, as viewed by retroillumination.
(Courtesy of Matt Weed, MD. Photograph by D. Brice Critser, CRA. Used with permission from the University of Iowa and EyeRounds.org.)
Excerpted from BCSC 2020-2021 series: Section 11 - Lens and Cataract. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.