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May 31, 2015 · 3. The blind spot indicates the location of the optic nerve head—an area with no photoreceptors—in the temporal part of the visual field. 4. Anything obstructing the travel of light towards the retina may affect the field tests, for example, lens opacity (cataract), ptosis (if not taped away from the pupil) or the rim of a correcting lens ...
- 1MB
- Sui H Wong, Gordon T Plant
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- 2015
OSCE Checklist: Blind Spot Assessment. Ask the patient to focus on part of your face (e.g. nose) and not move their head or eyes during the assessment. You should do the same and focus your gaze on the patient’s face.
- Background
- Introduction
- Blind Spot Assessment
- To Complete The Examination…
A physiological blind spot exists in all healthy individuals due to the lack of photoreceptor cells in the area where the optic nerve emerges through to the retinal plane (optic nerve head / optic disc). In day-to-day life, the brain does an excellent job of reducing our awareness of the blind spot by using information from other areas of the retin...
Wash your hands and don PPEif appropriate. Introduce yourself to the patient including your name and role. Confirm the patient’s name and date of birth. Briefly explain what the examination will involve using patient-friendly language. Gain consentto proceed with the examination. Position the patient sitting on a chair. Ask if the patient has any p...
1. Sit directly opposite the patient, at a distance of around 1 metre. 2. Ask the patient to cover one eye with their hand. 3. If the patient covers their right eye, you should cover your left eye (mirroring the patient). 4. Ask the patient to focus on part of your face (e.g. nose) and not move their head or eyes during the assessment. You should d...
Explain to the patient that the examination is now finished. Thank the patientfor their time. If mydriatic drops were instilled, remind the patient they cannot drive for the next 3-4 hoursuntil their vision has returned to normal. Dispose of PPE appropriately and wash your hands. Summariseyour findings
- Dr Lewis Potter
The point where your optic nerves converge to exit the eye and into the brain is known as the optic disc. This area of the eye has no light-sensitive cells to detect light rays. This results in a break in the visual field known as your “blind spot.” When the cross mark disappears, you instead “see” a continuous white field.
Aug 28, 2013 · Blind spot. A physiological blind spot exists in all healthy individuals as a result of the lack of photoreceptor cells in the area where the optic nerve passes through the optic disc.
The dB (decibel) numbers are a measure of the patient’s ability to see dim stimuli. Range from 0 to 50. 30 is fairly normal 0-20 indicates low sensitivity and significant field loss. >40 indicates “hypersensitivity” and that the patient may be “trigger happy”—usually indicating an unreliable test.
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3 days ago · A visual field test is an eye exam that checks for blind spots in your line of vision, It can help determine the cause of vision problems, including glaucoma.
