By Simon Nicholas Madge, James Kersey, Matthew Hawker, Meon Lamont (eds.)
A pragmatic guide at the exam concepts, apparatus, investigations and optical ideas which the start trainee in ophthalmology must master.
- available and accomplished consultant to the sensible talents and ideas with which the trainee ophthalmologist should be familiar
- Clear information on use of kit which takes trainees substantial perform to grasp -- e.g. slit-lamps, ophthalmoscopes, phacoemulsification machines and injectable or foldable lenses
- Covers eye exam concepts and investigations equivalent to visible fields and fluorescein angiography
- Very transparent and simply comprehensible part on medical optics, explaining suggestions akin to ametropia
- Illustrated in color throughout
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Extra resources for Clinical Techniques in Ophthalmology
Round. The steepest part of the cornea (hot spot) is round and often decentered. Oval. The steepest part of the cornea (hot spot) is oval and may be centered or decentered. Superior steep (SS). The steepest part of the cornea is localized in the upper part of the cornea. Fig. 5 Horizontal symmetric bowtie indicating against-the-rule astigmatism 30 Fig. 6 Oblique symmetric bowtie indicating oblique astigmatism Fig. 7 Enantiomorphism. M. Sinjab 2 Patterns and Classifications in Ectatic Corneal Diseases 31 Fig.
SS superior steep, IS inferior steep, SB symmetric bowtie, SB/SRAX symmetric bowtie with skewed steepest radial axis index, AB/IS asymmetric bowtie/inferior steep, AB/SS asymmetric bowtie/superior steep, AB/SRAX asymmetric bowtie with skewed steepest radial axis index Inferior steep (IS). The steepest part of the cornea is localized inferior to the apex of the cornea. Irregular. Corneal surface has no particular shape, that is, in this pattern steep areas are mixed with flat areas. Symmetric bowtie (SB).
2. Irregular patterns (Fig. 16). They are seen in abnormal distorted corneas. 3. Isolated island (Fig. 17, white arrow). It is encountered in normal corneas with minor astigmatism as well as abnormal distorted corneas with central or paracentral protrusion. M. Sinjab Parameters (BFTE Float Mode) Roughly speaking, values within the 5-mm central circle > +12 μm and > +15 μm on the anterior and posterior elevation maps, respectively, are considered as abnormal . According to Holladay, the correspondence of a hot spot on the tangential map with the lowest value in the relative pachymetry map and the > +15 μm on the posterior elevation map diagnoses forme fruste keratoconus (FFKC) .