Common Eye Issues: Light Spots, Black Dots, and More - Ophthalmology

Dr. Gao Pilin reply Ophthalmology

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Hello:
1.
Based on the phenomenon you described, the light spot that appears during blinking may be referred to as "blue light halo." This is a physiological phenomenon caused by light passing through the blood vessels, fundus, and retina of the eye, where differences in the transparency of the vessel walls lead to varying light reflections, ultimately forming the light spot.
Generally, this phenomenon is harmless and does not require special treatment.
2.
This phenomenon may also be attributed to "vitreous floaters." The vitreous is a transparent gel-like substance in the eye that occupies most of the eyeball's space.
As one ages, proteins and other substances in the vitreous gradually clump together to form solid materials, which are the primary cause of vitreous floaters.
Symptoms of vitreous floaters include seeing images resembling tape or butterflies, flashes of light, blurred or hazy vision, and sometimes the appearance of black dots or lines.
Vitreous floaters are usually harmless, but if acute and significant symptoms occur, such as a sudden increase in black dots or lines, severe flashes, or pain, it may indicate serious eye conditions like retinal detachment, and prompt medical evaluation is necessary.
It is advisable to consult an ophthalmologist for a detailed eye examination to determine the cause and receive appropriate treatment recommendations.
3.
The Amsler grid is a commonly used ophthalmic test to assess the sensitivity of the eyes to visual details.
Generally, a normal person should be able to quickly see the black and white squares of the Amsler grid, and the size and shape of the squares should remain stable without significant distortion or shrinkage.
If you notice any distortion or a sense of shrinking in the squares, it may indicate an abnormality, and it is recommended to seek medical evaluation promptly.
4.
Retinal laser therapy is a method used to treat retinal diseases by using lasers to target lesions on the retina, effectively burning away the affected areas to prevent further deterioration.
This helps protect eye health and avoid vision loss.
The laser burns are applied to the surface of the retina, while the optic nerve passes through the retina from the center of the eyeball, so retinal laser therapy typically does not affect the optic nerve.
If the treatment is appropriate, in most cases, the central optic nerve can remain unaffected.
However, in some situations, such as when the lesions are too close to the optic nerve, there is a possibility of some degree of damage to the optic nerve.
5.
The transient appearance of black spots is commonly referred to as "transient scotoma." This phenomenon is quite common and usually does not cause any harm to the eyes.
There are many potential causes for transient scotoma, including eye fatigue, low blood sugar, and changes in internal eye substances.
If you experience this condition occasionally and do not have other visual issues, there is typically no need for concern.
However, if you frequently experience black spots or other visual problems, it is best to consult an ophthalmologist to ensure eye health.
6.
The duration of posterior vitreous detachment varies from person to person; some may last only a few weeks, while others may persist for several months to over a year.
The occurrence of flashes may vary depending on the degree of detachment and the interaction between the vitreous and the retina.
If the flashes persist, it is advisable to seek medical attention again and inform the healthcare provider of your symptoms.
In some cases, a fundus examination may be necessary to confirm whether the retina is affected.
As for the already detached vitreous, it typically does not reattach.

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Reply Date: 2023/04/16