In patients with headaches, the finding of swollen optic discs, or papilledema, on ophthalmoscopy is a key sign, as this indicates raised intracranial pressure (which could be due to hydrocephalus, benign intracranial hypertension (aka pseudotumor cerebri) or brain tumor, amongst other conditions. It is used to detect and evaluate symptoms of various retinal vascular diseases or eye diseases such as glaucoma. Ophthalmoscopy is done as part of a routine physical or complete eye examination, mainly done by optometrists and ophthalmologists. It is used for peripheral viewing of the retina. An indirect ophthalmoscope can be either monocular or binocular. Furthermore, it allows a better view of the fundus of the eye, even if the lens is clouded by cataracts. It provides a wider view of the inside of the eye. An indirect ophthalmoscope, on the other hand, constitutes a light attached to a headband, in addition to a small handheld lens.The pan-ophthalmoscope has a larger primary lens with a variable focusing, allowing for a wider field-of-view. This type of ophthalmoscope is most commonly used during a routine physical examination. The direct ophthalmoscope is an instrument about the size of a small flashlight (torch) with several lenses that can magnify up to about 15 times.Slightly beyond equator Įach type of ophthalmoscopy has a special type of ophthalmoscope: Indirect ophthalmoscopy one that produces an inverted, or reversed, image of 2 to 5 times magnification.Direct ophthalmoscopy one that produces an upright, or unreversed, image of approximately 15 times magnification.The left image (right eye) shows lighter areas close to larger vessels, which has been regarded as a normal finding in younger people. Both optic discs have some pigmentation at the perimeter of the lateral side, which is considered non-pathological. The gaze is into the camera, so in each picture the macula is in the center of the image, and the optic disc is located towards the nose. Each fundus has no sign of disease or pathology. However, although dilated fundus examination is ideal, undilated examination is more convenient and is also helpful (albeit not as comprehensive), and it is the most common type in primary care.Īn alternative or complement to ophthalmoscopy is to perform a fundus photography, where the image can be analysed later by a professional.įundus photographs of the right eye (left image) and left eye (right image), seen from front so that left in each image is to the person's right, demonstrating the structures that can be seen in ophthalmoscopy. Therefore, dilation of the pupil ( mydriasis) is often accomplished with medicated eye drops before funduscopy. Opening the pupil wider (dilating it) is a simple and effective way to better see the structures behind it. The pupil is a hole through which the eye's interior will be viewed. It is crucial in determining the health of the retina, optic disc, and vitreous humor. It is done as part of an eye examination and may be done as part of a routine physical examination. Ophthalmoscopy, also called funduscopy, is a test that allows a health professional to see inside the fundus of the eye and other structures using an ophthalmoscope (or funduscope).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |