slit-lamp

(redirected from Volk lens)

slit-lamp

A low-power, binocular microscope with an intense light source, used to examine the internal structures of the front part of the eye and, by means of special eye contact lenses, the VITREOUS BODY and the RETINA.

slit-lamp 

Instrument producing a bright focal source of light with a slit of variable width and height. It may be used to examine the tissues of the anterior segment of the eye in conjunction with a microscope (usually binocular) of variable magnification. To examine the internal structures of the eye including the retina an auxiliary lens is required. Many such lenses exist, some which do not make contact with the eye (e.g. Hruby lens, Volk lens) and others which come in contact with the eye, usually like a scleral type of lens (e.g. Goldmann lens, Thorpe four mirror fundus lens, Wilson three mirror fundus lens). A slit-lamp is essential in contact lens practice. This instrument is also commonly called a biomicroscope (Fig. S9). See fundus biomicroscopy; gonioscope; illumination; Shaffer and Schwartz van Herick method; Smith's method; slit-lamp microscope; endothelial polymegethism.
Fig. S9 Slit-lamp (Shin Nippon)enlarge picture
Fig. S9 Slit-lamp (Shin Nippon)
References in periodicals archive ?
Although the Daytona may not seem any different to similar devices that are often found in private practice, because of the widefield photograph that it takes, it has the ability to spot a retinal tear far out in the periphery, which would be difficult to spot with a Volk lens.
Tenders are invited for Wireless Indirect Ophthalmoscope With 20 D Volk Lens , Specification As Per Annexure A
Although retinal examination with an opthalmascope or volk lens is standard practice, most opticians don't have a digital camera to create a permanent record.
Part 2 is a series of Objective Structured Clinical Examinations (OSCEs) that are designed to check a practitioner's skills with a Volk lens, as well as their knowledge of the ophthalmic conditions.
Interestingly, it is possible to record fundus images with the DC-4 in conjunction with a Volk lens.
Now, my Volk lens is still a staple part of my routine, but the direct ophthalmoscope is decidedly out of favour.
Tenders are invited for Supply of Indirect Ophthalmoscope With 20D Volk Lens Wireless
Although some patients only require a simple refraction, the hospital brings a wide scope of patients and I never hesitate to use a slit lamp or a Volk lens to investigate any abnormalities a patient may present with.
2 to 12mm so it makes the peripheral retina very accessible with a Volk lens.
But optometrists are much more accustomed to seeing the retina face on, or 'en face', with the ophthalmoscope, Volk lens or fundus camera.
A raffle on the night saw prizes up for grabs including a Volk lens and lens clocks, as well as an acoustic guitar, a Google tablet and a pair of designer sunglasses.
Ninety per cent of practitioners responded that they would examine the patient through dilated pupils and using BIO such as Volk lens, while 87% said they would fund the examination using a GOS sight test with a code; 75% would then be happy to see the patient routinely and not refer to the HES, providing information regarding retinal detachment had been issued.