What is a Volk lens?

The Digital 1.0x Imaging Volk Lens is a Slit Lamp Lens, Ideal for slit lamp photography. The Digital 1.0x Imaging Lens is optimized for the visible spectrum and was designed to reduce glare and reflections during general diagnosis and slit lamp imaging.

What is a Volk lens used for?

Fundus biomicroscopy lenses are probably the most important tool that the majority of optometrists have at their disposal to screen and diagnose posterior eye pathology.

What magnification is Volk?

Non-Contact Condensing Lenses

Lens Image Magnification Laser Spot
78D 0.93 1.08
90D 0.76 1.32
Volk Superfield 0.76 1.32
Volk Super 66 1.00 1.00

How do you do a Volk assessment?

Quote from video:
And what you want to do is just bring it to your shoulders over the patient's eye have a look and make sure it's in focus and just look for the red leaflets through the people.

What is a Volk 90D?

Volk 90D Lens quantity. The original Volk 90D lens started the slit lamp examination revolution! The 90D features a small 26mm diameter ring design which is outstanding for dynamic fundoscopy. Volk’s exclusive Double Aspheric optical design expands the usable viewing field beyond that of competitive designs.

What is a 20D lens?

20D Lens provides an extended working distance from cornea. Sterilizable, Perfect equilibrium of magnification and field of view. Perfectly corrected for field curvature, astigmatism, aberrations and coma. 20D Slit Lamp Lens offers an ideal combination of field and magnification.

How do you use a 20D Volk lens?

Quote from video:
Hold a smartphone at least 15 to 20 centimeters away from the eye. Turn on the light source make sure it is well aligned to the pupil of the eye. And slowly. Get it in focus.

What is 90D lens used for?

This slit lamp lens is used for general examination of the fundus and small pupil examinations. This Slit lamp lens is the most popular power for non-contact fundus examination. It offers a wide-field fundus imaging out to and beyond the equator.

How do you use a 90D lens with a slit lamp?

Quote from video:
Move your slit lamp forward carefully. Until you have a sharp image of a retinal vessel. Then move the lens forward to increase the visible area of the retina.

What is indirect ophthalmoscope?

Ismael Cordero. The binocular indirect ophthalmoscope, or indirect ophthalmoscope, is an optical instrument worn on the examiner’s head, and sometimes attached to spectacles, that is used to inspect the fundus or back of the eye. It produces an stereoscopic image with between 2x and 5x magnification.

What is scleral indentation?

Scleral depression, also known as scleral indentation,1 is a technique used to evaluate the peripheral retina. By rolling the scleral depressor anterior/posterior and radially, one can view the peripheral retina, ora serrata, and pars plana at alternative angles in a dynamic nature.

How do you check for peripheral retina?

Enhance Your Skills

  1. Start with yourself. You might find it instructive to have a colleague practice scleral depression and placement of the contact lens on you, Dr. …
  2. Practice, practice, practice. …
  3. Study the classics. …
  4. Align with the patient. …
  5. Go for macro and micro views. “ …
  6. Go slow. …
  7. Be systematic. …
  8. Position the eye.

What is a bio in Optometry?

BIO is one of the ways used to view the retina, with a wide field of the retina and stereoscopic view. BIO also allows dynamic observation of the retina by moving the BIO device, lens, and applying scleral depression. The process is “indirect” because the fundus is viewed through a hand held condensing lens.

Which is better 78D vs 90D?

In other words, the overall field-of-view comparison between a 90D and 78D funduscope is made such that: If the two lenses were of equal diameter, the 90D would create greater field; however, because the 78D is substantially larger than the 90D, it actually generates greater field of view; and, within the boundaries of …

How is fundus test done?

obtain a better view of the fundus of eye. Dilated fundus examination or dilated-pupil fundus examination (DFE) is a diagnostic procedure that employs the use of mydriatic eye drops (such as tropicamide) to dilate or enlarge the pupil in order to obtain a better view of the fundus of the eye.

How do you perform a Fundoscopic exam?

Quote from video:
To look at the front surface of the eye.

What are retinas?

The retina is a layer of tissue in the back of your eye that senses light and sends images to your brain. In the center of this nerve tissue is the macula. It provides the sharp, central vision needed for reading, driving and seeing fine detail. Retinal disorders affect this vital tissue.

What kind of mirror is used in ophthalmoscope?

concave mirror

The ophthalmoscope consists of a concave mirror with an orifice at the center through which the viewer examines the eye. A light source is then reflected to the eye from the mirror.

What is optic cup?

Optic cup: The white, cup-like area in the center of the optic disc. The optic disk is the circular area at the back of the inside of the eye where the optic nerve connects to the retina.

What is drusen in eye?

Drusen are small, yellowish deposits of cellular debris that accumulate under the retina — the light-sensitive layer of cells at the back of the eye that’s essential to vision. Drusen occur in most people over age 60 and are more common in women than men.

What is glaucoma cupping?

Glaucoma is caused by high pressure in the eye damaging the optic nerve, which results in loss of individual nerve cells. This causes a subsequent increase in the size of the cup, also called cupping. As a general rule, the cup should not make up more than three tenths or 30% of the total area of the optic nerve.

What is a normal eye pressure?

Eye pressure is measured in millimeters of mercury (mm Hg). Normal eye pressure ranges from 10-21 mm Hg. Ocular hypertension is an eye pressure of greater than 21 mm Hg.

What is the best vitamin to take for glaucoma?

Some evidence suggests that a high intake of vitamin B through dietary sources, including green leafy vegetables, may reduce the risk of some types of glaucoma.

Is eye pressure of 50 high?

Eye pressure levels between 21-30 mmHg associated with glaucoma usually cause damage over a number of years. However, an IOP in the 40-50 mmHg range can lead to retinal vascular occlusion, a potentially serious condition in which blood vessels that serve the retina are blocked.