Improved Illumination in Indirect Ophthalmoscopy

Improved illumination in indirect ophthalmoscopy.

THE indirect method of ophthalmoscopy offers several advantages over the direct method; these include larger field of view, better penetration of hazy media, greater depth of focus, and closer approach to the ora serrata (Schepens and Bahn, 1950). These features are of especial importance in cases of detachment of the retina, where the necessity of studying the topography and locating all the t...

An inexpensive method of indirect ophthalmoscopy.

Attention is drawn to the possibility of performing monocular indirect ophthalmoscopy with a pen torch and a condensing lens when facilities for binocular indirect ophthalmoscopy are not available.

Indirect illumination on curve surfaces

In this paper we suggest improved method of photon registration on curve surfaces, presented by triangulated mesh with “true” normals in mesh vertices. Such presentation is widely used for simulation the differing effects of light and color across the surface of an object (Phong shading). It was found that direct photon registration, which does not take into account interpolated (smooth) normal...

Unwanted reflections during slit lamp assisted binocular indirect ophthalmoscopy

Video indirect ophthalmoscopy using a hand-held video camera

Fundus photography in adults and cooperative children is possible with a fundus camera or by using a slit lamp-mounted digital camera. Retcam TM or a video indirect ophthalmoscope is necessary for fundus imaging in infants and young children under anesthesia. Herein, a technique of converting and using a digital video camera into a video indirect ophthalmoscope for fundus imaging is described. ...