What is a binocular indirect ophthalmoscope used for?

What is a binocular indirect ophthalmoscope used for?

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 are the advantage of using indirect ophthalmoscope?

The monocular indirect ophthalmoscope (or PanOptic) allows a five times greater area of the fundus to be viewed than with direct ophthalmoscopy. With this instrument it is possible to view beyond the equator when the patient has dilated pupils.

Is direct or indirect ophthalmoscopy better?

Direct ophthalmoscopy one that produces an upright, or unreversed, image of approximately 15 times magnification. Indirect ophthalmoscopy one that produces an inverted, or reversed, image of 2 to 5 times magnification….Types.

Features Direct ophthalmoscopy Indirect ophthalmoscopy
Image Virtual, erect Real, inverted

What is the principle of indirect ophthalmoscope?

In summary, the purpose of the ophthalmoscopy lens in indirect ophthalmoscopy is to redirect diverging pencils of light emerging from the patient’s pupil toward the observer’s eye. In doing so, the lens also focuses parallel rays within each pencil into an inverted aerial image of the patient’s fundus.

How can I get better at 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.

Why is it called indirect ophthalmoscope?

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

How do you check for peripheral retina?

Visualizing the periphery: To look in the far periphery, tilt your own head 45 degrees to the left or right. At that angle the pupil effectively becomes elliptical and you can fit the indirect’s illumination beam and one ocular into that ellipse.

What is Hruby lens?

Hruby lens (Figure 1 & 2) is a high minus (originally -58.6 D) non-contact lens mounted on the slit lamp for stability. It provides a high resolution, upright image of structures in the posterior pole. …

How many types of ophthalmoscopy are there?

There are two kinds of ophthalmoscopes. The one that looks a bit like a telescope is called a panoptic. The traditional type of ophthalmoscope is more compact and is called a standard head. The test is a routine part of an eye exam.

How do you check retinal periphery?

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