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.

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.

Why indirect ophthalmoscope is called indirect?

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

What is the difference between direct and indirect ophthalmoscopy?

It is of two major types: 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.

Why are Ophthalmoscopic examinations important?

It is used to detect and evaluate symptoms of retinal detachment or eye diseases such as glaucoma. Ophthalmoscopy may also be done if you have signs or symptoms of high blood pressure, diabetes, or other diseases that affect the blood vessels.

What are the types of ophthalmoscope?

There are different types of ophthalmoscopy.

  • Direct ophthalmoscopy. You will be seated in a darkened room.
  • Indirect ophthalmoscopy. You will either lie or sit in a semi-reclined position.
  • Slit-lamp ophthalmoscopy. You will sit in a chair with the instrument placed in front of you.

What does an ophthalmoscope examine?

Ophthalmoscopy is an examination of the back part of the eye (fundus), which includes the retina, optic disc, choroid, and blood vessels.

Why is an Ophthalmoscopic examination important?

An ophthalmoscopic examination is important because it can detect retinal detachment or eye diseases. Define the following terms: accommodation, astigmatism, blind spot, cataract, emmetropia, glaucoma, hyperopia, myopia, and refraction.

What is ophthalmoscope definition?

Definition of ophthalmoscope : an instrument for use in viewing the interior of the eye and especially the retina. Other Words from ophthalmoscope Example Sentences Learn More About ophthalmoscope.