Visual Distortion: When to Seek Eye Care

Q: Visual Distortion: When to Seek Eye Care

Hello, Duck： The so-called blind spot is the area where the optic nerve is located, and you should not see anything in that region. <br>If you notice distortion at the intersection of the black lines in the tile gaps, it is likely because your eyes are moving to that area. <br>If

Visual distortion

Hello Doctor, recently when I looked at the floor tiles, I noticed that there was a distortion at the intersection of the black lines in the tile gaps, specifically to the right of my fixation point in my right eye.
When I tried to move my finger to the distorted area to see if it would also appear distorted, I found that my finger disappeared.
I realized that this distorted area, where my finger disappeared, is near the blind spot of my eye.
The blind spot I refer to is when I extend both arms straight out in front of me, about 30 centimeters from my eyes, and make a "thumbs up" gesture with both hands.
With my left eye open and my right eye closed, I look at the thumb of my right hand.
When I move my left hand, which is in the "thumbs up" position, to the right until it is about 10 centimeters away, my left thumb disappears.
This point is the blind spot of my eye, and the same applies to my right hand.
Strictly speaking, I did not notice any distortion of my fingers; I just felt that my thumb was missing, and there was no distortion at the base of my thumb.
Additionally, when I removed my glasses and looked at the floor tiles again, my vision was blurry due to my myopia, and since that area is also a blind spot, it was really difficult for me to observe any distortion (it seemed to be slightly distorted).
Furthermore, my current glasses are a prescription that is 50 degrees lower than my previous ones.
The previous glasses were measured with instruments when they were prescribed, but this pair (the -50 degrees) was not re-measured; the optical shop directly sent it to the factory for production.
I am unsure if this phenomenon is related to the lenses.
In my daily life, when I cover one eye, I do not feel any significant distortion.
Should I go to a major hospital for a detailed examination? I also looked at the Amsler grid and did not see any distortion; perhaps it is because the grid is not large enough to test that point.
Is the Amsler grid 10 centimeters in length and width?

yazi, 20~29 year old female. Ask Date: 2017/05/06

Dr. Gao Pilin reply Ophthalmology

Hello, Duck: The so-called blind spot is the area where the optic nerve is located, and you should not see anything in that region.
If you notice distortion at the intersection of the black lines in the tile gaps, it is likely because your eyes are moving to that area.
If your eyes are not moving, peripheral vision should not show any distortion.
Therefore, you should focus on using your central vision.
If the Amsler grid does not show any distortion, it indicates that your central vision is unaffected.
The distortion you see through your lenses is most likely due to the optical properties of your glasses.
The Amsler grid is generally 10 cm by 10 cm, with each square measuring 0.5 cm by 0.5 cm.
It is advisable for you to visit an ophthalmologist for a thorough examination.
The ophthalmology department at Puzi Hospital in Taiwan is open Monday to Friday from 8:00 AM to 12:00 PM and Wednesday from 1:00 PM to 4:30 PM.
Online responses can only serve as a reference; if necessary, you should seek medical attention at a healthcare facility.
I hope to have the opportunity to assist you.
Gao Pilin

Reply Date: 2017/05/06

More Info

It sounds like you are experiencing some concerning visual distortions, particularly with the perception of straight lines appearing warped or twisted, and the phenomenon of your fingers disappearing when they fall into your blind spot. These symptoms can be quite alarming, and it's understandable that you are seeking clarity on whether you should pursue further eye care.

Firstly, the visual distortions you describe, such as the twisting of lines and the disappearance of objects in your peripheral vision, could be indicative of several underlying issues. One possibility is that you may be experiencing a condition known as metamorphopsia, which is often associated with retinal problems, particularly involving the macula. This condition can lead to the distortion of straight lines and the perception of objects appearing warped. Additionally, the blind spot you mentioned is a normal part of human vision, where the optic nerve exits the eye, but if you are noticing changes in this area, it warrants further investigation.

Given that you have a history of myopia (nearsightedness) and are currently using glasses that have not been properly measured for your current prescription, it is essential to consider that your visual disturbances may be exacerbated by an incorrect lens prescription. Wearing glasses that do not accurately correct your vision can lead to strain and discomfort, which might contribute to the symptoms you are experiencing.

Regarding the Amsler grid test you mentioned, it is indeed a useful tool for detecting visual distortions, particularly in the central visual field. The standard size of the Amsler grid is typically 10 cm x 10 cm, and it is designed to help individuals identify any changes in their vision, such as distortion or missing areas. If you did not observe any distortions while using the grid, it may suggest that your central vision is relatively intact, but this does not rule out potential issues in your peripheral vision or other areas of your visual field.

In light of your symptoms, it is highly advisable to seek a comprehensive eye examination from an ophthalmologist, especially since you are experiencing visual distortions and have concerns about your current glasses prescription. A thorough examination can include tests for visual acuity, peripheral vision, and retinal health, which will help determine if there are any underlying conditions that need to be addressed.

In summary, while some visual distortions can be benign, the combination of your symptoms suggests that a detailed evaluation is warranted. It is better to err on the side of caution when it comes to eye health, especially given the potential implications of retinal issues. Please consider scheduling an appointment with an eye care professional who can provide you with a comprehensive assessment and appropriate recommendations based on your specific situation. Your vision is invaluable, and taking proactive steps to ensure its health is crucial.

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