Name the procedure shown here ?
Image shown is of a hand held self illuminated instrument. As seen it has a sleeve which can be rotated - this is hence a Streak Retinoscope. A direct ophthalmoscope in contrast has no sleeve and would have apeure sizes and filters available on the head for the examination of the retina. A Direct Ophthalmoscope Retinoscopy Method Movement of red reflex is observedRetinoscope is moved in both veical and horizontal directionsLight is thrown into the patient's eye and fundal red reflex is observed casting a shadow in the papillary area (with a hole in the retinoscope)Instructed to look at a far point/object to relax accomodationPatient is made to sit at a distance of 1 m If cylindrical error (Astigmatism) is present, find the cylinder power with spherocylinder lens combination NeutralizationBy addition of Convex (+) or Concave (-) lenses, if spherical error Similar movement in both meridians (veical and horizontal) indicates spherical refractive error 1.Movement of red reflex with the movement of retinoscope: < 1D MyopiaEmmetropiaHypermetropia 2.No movement of red reflex: 1D MyopiaQ 3.Movement of red reflex against the movement of retinoscope> 1D Myopia
Retinoscopy
Tonometry
Distant direct ophthalmoscopy
Pachymetry
Diagnosis and Treatment of Retina