Vitreo-retinal biomicroscopy using bilaterally aspherical Volk lenses (+78 D, +90 D)]

Aspherical+ Volk lenses allow a full realization of El Bayadi conception of use of a great power a positive lens for the indirect ophthalmoscopy by means of a biomicroscope. The authors compared the techniques of ophthalmoscopy with utilization of a biomicroscope pointing to following advantages of the Volk lens: the lack of contact with the patient's eye (avoidance of eventual transmission of infection), possibility of examination of the entire area of the fundus, a detailed evaluation of the vitreous, possibility of examination even by narrow pupil, a high comfort of examination for the patient. These advantages were confirmed during the examination of 51 eyes with retinal detachment, pathological changes of the macula and the optic disc and with intraocular tumors.