By Edward L. Raab, MD, JD
Examines the medical gains, analysis and remedy of esodeviations and exodeviations, horizontal and vertical deviations, amblyopia and distinct sorts of strabismus. Discusses the complete diversity of pediatric ocular problems, extraocular muscle anatomy, motor and sensory body structure and the way to set up rapport with youngsters in the course of an ocular exam. includes a number of photos, together with colour photographs. lately revised 2010 2011.
Read or Download 2011-2012 Basic and Clinical Science Course, Section 6: Pediatric Ophthalomology and Strabismus (Basic & Clinical Science Course) PDF
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Extra info for 2011-2012 Basic and Clinical Science Course, Section 6: Pediatric Ophthalomology and Strabismus (Basic & Clinical Science Course)
In dextrocycloversion, both eyes rotate so that the superior portion of the verti cal cor neal meridian moves to the patient's right. Similarly, levocycloversiol'l is movement of both eyes so that the superior portion of the vertica l co rneal meridian rotates to the patient's left. The term yoke muscles is used to describe 2 muscles (I in each eye) that are th e prime movers of the ir respective eyes in a given position of gaze. For example. when the eyes move or attempt to move into right gaze, the right lateral rectus muscle and the left medial rectus mllscle are Simultaneously inn ervated and contracted.
The superior rectus muscle originates from the annulus of Zinn and cou rses anteriorly> upward over the eyeball, and laterally, forming an angle of 23° with the visual axis of the eye in primary position (Fig 2~1; see also Chapter 3, Fig 3~4). In primary position, this muscle's primary action is elevation, secondary action is intorsion (incycloduction), and tertiary action is adduction. The inferior rectus muscle also arises from the annulus ofZinn, and it then courses anteriorly, downward, and laterally along the floor of the orbit, forming an angle of 23° with the visual axis of the eye in primary position (see Chapter 3, Fig 3~5) .
These capsules are thin posteriorly, but near th e equator th ey thicken as they pass through the sleeve of the Tenon capsule, continuing anteriorly with 20 • Pediatric Ophthalmology and Strabismus septum of Zinn Lateral ,"0'". / Inferior ::-"'''''''~~;'s\-'';T-T-t---Orbital septum i i muscle cone Intermuscular septum Inferior oblique Figure 2-5 The muscle cone contains 1 fat cushion and is surrounded by another; these 2 fat cushions are separated by the rectus muscles and intermuscular septa. (Reproduced With permission from Yanoff M, Duker J, eds.