Ophthalmoscopie

Ophthalmoskopie (ophthalmoscopy) is a medical examination used to visualize the interior of the eye, particularly the retina, optic nerve, macula, and retinal vessels. It allows assessment for disorders such as diabetic retinopathy, glaucoma, hypertensive retinopathy, retinal detachment, and inflammatory or infectious eye diseases.

There are two main approaches: direct ophthalmoscopy and indirect ophthalmoscopy. Direct ophthalmoscopy uses a handheld or head-mounted instrument to illuminate the eye and provide a magnified view of a small retinal area. Indirect ophthalmoscopy employs a condensing lens (commonly around 20 diopters) held in front of the eye, producing a wider field of view and enabling examination of the peripheral retina. Slit-lamp biomicroscopy with a fundus lens is another method, combining magnification with adjustable illumination for detailed evaluation.

Procedure typically involves pupil dilation with mydriatic eye drops to improve visualization. The patient is positioned comfortably, and the examiner aligns the instrument with the eye while the patient looks at a fixed point. Direct ophthalmoscopy offers high magnification of a limited area, whereas indirect ophthalmoscopy provides a broader view of the posterior segment, often essential for detecting peripheral pathology.

Limitations include reduced visualization from small pupils, cataracts, corneal opacities, or poor media clarity. Risks are generally minor and may include temporary blurred vision after dilation or, with contact methods, a small risk of corneal irritation.

The direct ophthalmoscope was developed in the 19th century, with indirect methods expanding in the 20th century to improve retinal visualization and examination efficiency.