By American Academy of Ophthalmology, Carl D. Regillo, MD
Presents present details from scientific trials on significant retinal stipulations, together with age-related macular degeneration and diabetic retinopathy. comprises an outline of diagnostic strategies in retinal imaging, electrophysiologic trying out, and new genetic ways to diagnosing and classifiying retinal dystrophies and degenerations.
Read or Download 2007-2008 Basic and Clinical Science Course Section 12: Retina and Vitreous PDF
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Extra resources for 2007-2008 Basic and Clinical Science Course Section 12: Retina and Vitreous
Some factors associated with simple myopia are as follows: Axial type of simple myopia may signify just a physiological variation in the length of the eyeball or it may be associated with precocious neurological growth during childhood. Curvatural type of simple myopia is considered to be due to underdevelopment of the eyeball. Role of diet in early childhood has also been reported without any conclusive results. Role of genetics. Genetics plays some role in the biological variation of the development of eye, as prevelance of myopia is more in children with both parents myopic (20%) than the children with one parent myopic (10%) and children with no parent myopic (5%).
Cardinal data of a mirror (Fig. 3) The centre of curvature (C) and radius of curvature (R) of a spherical mirror are the centre and radius, respectively, of the sphere of which the mirror forms a part. Normal to the spherical mirror at any point is the line joining that point to the centre of curvature (C) of the mirror. Pole of the mirror (P) is the centre of the reflecting surface. Principal axis of the mirror is the straight line joining the pole and centre of curvature of spherical mirror and extended on both sides.
Total amount of hypermetropia should always be discovered by performing refraction under complete cycloplegia. 2. The spherical correction given should be comfortably acceptable to the patient. However, the astigmatism should be fully corrected. 3. Gradually increase the spherical correction at 6 months interval till the patient accepts manifest hypermetropia. 4. In the presence of accommodative convergent squint, full correction should be given at the first sitting. 5. If there is associated amblyopia, full correction with occlusion therapy should be started.