What is binocular indirect ophthalmoscopy?

What is binocular indirect ophthalmoscopy?

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.

Why is it called indirect ophthalmoscopy?

The process is “indirect” because the fundus is viewed through a hand held condensing lens.

Which filters are used in indirect ophthalmoscope?

Cobalt blue filter is used along with fluorescein dye for angioscopy. A larger aperture light spot is used for a fully dilated pupil and intermediate and smaller apertures for a smaller or undilated pupil. Diffuse light filters and yellow filters make the illumination less bright and comfortable to the patient.

How do you practice binocular indirect ophthalmoscopy?

Indirect Ophthalmoscopy 101

1. Dilate properly. To conduct a good peripheral exam, the patient’s eyes must be well dilated.
2. Position the patient for optimal viewing.
3. Choose the right lens.
4. Minimize lens distortion.
5. Adjust the indirect headset.
6. Depress the sclera.
7. Ask for help when you need it.

How do you do an indirect ophthalmoscopy?

The indirect ophthalmoscope

1. Alignment: Put the indirect on, and ensure your oculars and light spot are properly centered.
2. Adjust the brightness: Don’t go crazy on the brightness (60-80% is generally enough on most models).
3. Choose your spot size: If the patient’s pupil is wide and dilated, use the largest spot size.

How do you practice indirect ophthalmoscopy?

Is Volk indirect ophthalmoscopy?

Slit lamp binocular indirect ophthalmoscopy (BIO), often simply called ‘Volk’ after the synonymous American lens manufacturer is a commonly performed technique in optometry and ophthalmology in the UK.

How is a binocular indirect ophthalmoscope used?

Binocular Indirect Ophthalmoscopes (BIOs) enable evaluation of the posterior segment of the eye. BIOs contain a binocular lens with mirrors and a light source, and are used in conjunction with handheld lenses.

Which is better indirect or direct ophthalmoscopy?

In indirect ophthalmoscopy, a real and inverted image is formed between the condensing lens and the observer. The advantage of stereopsis (depth perception) and a larger field of view makes indirect ophthalmoscope (IDO) more useful both in retina clinics and during posterior segment surgeries.

Who is the inventor of the indirect ophthalmoscope?

The Indirect Ophthalmoscope Gullstrand Indirect Ophthalmoscope ca. 1910 George T. Timberlake, Ph.D. Department of Ophthalmology University of Kansas Medical Center 79. If the retina could light up….

When to use the direct ophthalmoscope or the fundus?

The direct ophthalmoscope is a critical tool used to inspect the back portion of the interior eyeball, which is called the fundus. Examination is usually best carried out in a darkened room.