Ophthalmoscope

BY
RAIN HEALTH CARE

1. OPHTHALMOSCOPY IT IS done as part of an eye examination and may be done as part of a routine physical examination. Ophthalmoscopy is also called funduscopy , is a test that allows a health professional to see inside the fundus of the eye & other structures using an ophthalmoscope or funduscope .

2. ABOUT An instrument for examining the interior structure of the eye, especially the retina, consisting essentially of a mirror that reflects light into the eye and a central hole through which the eye is examined. Is process by which a medical professional investigate the body of a patient for signs of disease.

3. PRINCIPLE Helmholtz’s instrument operated by using a mirror to shine a beam of light into the eye. The observer would look through a tiny aperture in the mirror. Helmholtz found that looking through the lens into the back of the eye only produced a red reflection.

4. HOW DOES AN OPHTHALMOSCOPE WORK? YOUR EYE DOCTOR WILL DIM THE LIGHTS OF THE ROOM AND ASK YOU TO FOCUS ON A FIXED POINT ON A FAR WALL. USING DIRECT OR INDIRECT OPHTHALMOSCOPE, YOUR DOCTOR WILL EXAMINE THE STRUCTURE OF YOUR EYE. YOUR EYE DOCTOR IS LOOKING FOR SIGNS OF A HEALTHY RETINA & ALSO FAR INDICATIONS OF ANY NUMBER OF POTENTIAL EYE PROBLEMS LIKE CATARACTS OR MACULAR DEGENERATIONS.

5. TYPES OF OPHTHALMOSCOPY DIRECT OPHTHALMOSCOPY INDIRECT OPHTHALMOSCOPY

6. DIRECT OPHTHALMOSCOPY During direct ophthalmoscopy, you may here a clicking sound as the instrument is adjusted to focus an different structure in the eye. The light is some times very intense and you may see spots for a short time following the examination. These are actually the outlines of the blood vessels of the retina.

7. INDIRECT OPHTHALMOSCOPY The indirect ophthalmoscopy, the light is much more intense and may be some what uncomfortable. Pressure applied to your eyeball with the blunt instrument also may be uncomfortable. If the test is painful.

8. ADVANTAGES OF DIRECT OPHTHALMOSCOPY IT IS PORTABLE DEVICE IT IS EASY TO USE UPRIGHT IMAGE CAN USE WITHOUT DILATION. DISADVANTAGES OF INDIRECT OPHTHALMOSCOPY SMALL FIELD OF VIEW LACK OF STEREOPSIS MEDIA OPACITIES CAN DEGRADE IMAGE.

9. ADVANTAGES OF INDIRECT OPHTHALMOSCOPY Image not affected by the patients refractive power Delivery of laser Binocular examination of fundus up-to the periphery Large field of view. DISADVANTAGE: Difficult to learn Less magnification, therefore details of a small lesion not visualized properly Impossible with very small pupils More uncomfortable to the patient.

10. WHEN IS OPHTHALMOSCOPY USED? Damage to your optic nerve Retinal tear or detachment. Diabetes Hypertension, which is also known as high blood pressure Melanoma, a type of skin cancer that can spread to your eye.

11. USES OF OPHTHALMOSCOPE The red free in the ophthalmoscope is used to differentiate between retinal & choroidal lesion. Large aperture is used to examine the fundus through the dilated pupil. Small aperture is used to examine the fundus with small pupil.

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