TY - CHAP M1 - Book, Section TI - Chapter 590. Anterior Segment Disorders A1 - Walton, David S. A2 - Rudolph, Colin D. A2 - Rudolph, Abraham M. A2 - Lister, George E. A2 - First, Lewis R. A2 - Gershon, Anne A. Y1 - 2011 N1 - T2 - Rudolph's Pediatrics, 22e AB - The anterior segment of the eye consists of the cornea, the anterior chamber, the iris, the pupil, and the lens, which anatomically divides the anterior segment of the eye from its posterior segment. The posterior segment includes the vitreous gel, the retina, the optic nerve, and the choroid. This is a useful clinical division, because many diseases of the eye predominantly affect the anterior or posterior segment and are usefully differentiated from conditions (eg, endophthalmitis) that affect the whole eye. Casual inspection of the eye (the globe) is inevitably an assessment of the anterior segment structures and offers very little information about the internal, more posterior ocular structures. A checklist of anterior segment findings that may be recognized by the pediatrician would include cornea size and transparency; iris color (eg, heterochromia); pupil size, shape, position, and reaction to light; lens clarity (eg, cataract) and position (eg, dislocation/subluxation); and signs of elevated eye pressure. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/03/28 UR - accesspediatrics.mhmedical.com/content.aspx?aid=7060195 ER -