Visual Disturbances in High Myopia: What You Need to Know

Visual problems

When I cover my right eye, my left eye can look all the way to the left without any issues.
However, when I keep my gaze fixed to the far left and move my head side to side, I notice a sensation similar to a droplet of water moving along with my gaze.
This occurs when I turn my head to the right, but not when I turn to the left.
Once I stop moving my head, the sensation disappears.
The same occurs with my right eye.
I had a fundus examination last month, which showed that the retina in my left eye is thinner, while my right eye is normal.
I have high myopia, around -11.00 diopters.
I would like to know what this situation might be and if I am overthinking it.

Chung, 20~29 year old female. Ask Date: 2020/04/18

Dr. He Jianxian reply Ophthalmology

Based on your description, it seems more like floaters; however, since you have also undergone dilation to examine the retina, there shouldn't be too much concern.
Dr.
He Jianxian, Nantou Hospital.

Reply Date: 2020/04/18

More Info

Understanding visual disturbances in individuals with high myopia, especially those experiencing symptoms like the ones you've described, is crucial for both diagnosis and management. High myopia, defined as a refractive error greater than -6.00 diopters, can lead to various ocular complications due to the elongation of the eyeball and structural changes in the retina and vitreous body.

From your description, it seems you are experiencing a phenomenon often associated with vitreous changes, particularly in the context of high myopia. The sensation of seeing "water droplets" or other visual disturbances when moving your head could be attributed to several factors:
1. Vitreous Degeneration: In high myopia, the vitreous gel can undergo liquefaction and posterior vitreous detachment (PVD). This can lead to the perception of floaters or visual distortions, especially when the eye moves. The vitreous may pull on the retina, causing transient visual disturbances that can feel like moving objects or shadows.

2. Retinal Changes: Given that your left retina is thinner, it is essential to monitor for any potential complications such as retinal tears or detachments. Although your symptoms may not indicate an immediate problem, the structural changes in the retina associated with high myopia can predispose you to these conditions. Regular follow-up with your ophthalmologist is crucial.

3. Visual Sensitivity: The brain processes visual information from both eyes, and when one eye is occluded, the brain may rely more heavily on the other eye. This can sometimes lead to heightened awareness of any disturbances in the visual field, especially if there are underlying issues with the retina or vitreous.

4. Phosphenes: The sensation of seeing light or movement when moving your head could also be related to phosphenes, which are visual sensations not caused by light entering the eye. They can occur due to mechanical stimulation of the retina or optic nerve, particularly in individuals with structural changes in the eye.

5. Psychological Factors: Anxiety and hyper-awareness of visual symptoms can lead to increased perception of disturbances. If you are concerned about your vision, this can amplify your sensitivity to any changes.

Given your high myopia and the findings from your recent eye examination, it is advisable to maintain regular check-ups with your ophthalmologist. They may recommend additional imaging, such as optical coherence tomography (OCT), to monitor the status of your retina and vitreous. If you experience any sudden changes in your vision, such as flashes of light, a sudden increase in floaters, or a shadow in your peripheral vision, seek immediate medical attention, as these could be signs of a retinal tear or detachment.

In summary, while your symptoms may be related to the expected changes associated with high myopia, it is essential to remain vigilant and consult with your eye care provider for ongoing assessment and peace of mind. Regular monitoring can help catch any potential issues early and ensure appropriate management.

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