Vision Issues: Why New Glasses Feel Different

Some issues related to glasses?

Hello, doctor.
I have a few questions to ask you.
My myopia is -3.75 diopters (which should have increased, as that was measured 5.6 years ago when I got my glasses).
I used those glasses until last year, and around this time last year, I got a new pair.
Initially, the optical store measured my prescription and provided me with -4.00 diopters, but I felt uncomfortable wearing them, as if the prescription was too strong, and it made me dizzy.
So, I requested the optical store to reduce the prescription back to -3.75 diopters.
However, strangely, I still experienced that dizzy feeling even with the -3.75 glasses.
I stopped wearing the new glasses and continued using the old ones.
My questions are:
1.
Why is there such a significant difference in comfort when wearing glasses with the same prescription and lenses?
2.
When I wear the new glasses, it seems like I can see more clearly (but it makes me dizzy).
After taking them off, my vision seems blurrier compared to when I take off the old glasses.
Why is that?
3.
If I continue to wear the new glasses and this situation persists, will my myopia worsen? (I have been wearing the same prescription for over five years with the same pair of glasses.)
P.S.
The lenses and prescription of both the new and old glasses are the same, but the frame styles are different.
Thank you for your response.

lytton, 20~29 year old female. Ask Date: 2004/09/17

Dr. Wang Ziyang reply Ophthalmology

The only possible issue with your problem could be related to the pupillary distance of your glasses, and it is advisable to seek medical attention promptly to resolve it.

Reply Date: 2004/09/17

More Info

When transitioning to a new pair of glasses, especially after a significant period of using the same prescription, it is not uncommon to experience discomfort or visual disturbances. Your situation raises several important points regarding the adaptation to new eyewear, particularly when the prescription and lens type appear to be similar. Let's address your questions systematically.

1. Why does the same prescription feel different?
Even if the prescription is the same, several factors can contribute to the perceived difference in comfort and clarity. The design of the lenses plays a crucial role. For instance, if your new glasses have a different lens shape, thickness, or curvature, it can affect how light enters your eyes. Additionally, the frame style can influence the positioning of the lenses relative to your eyes, which can alter your field of vision and how you perceive depth. If the new frames are significantly larger or smaller, or if they sit differently on your nose, this can also lead to discomfort or a feeling of distortion.

2. Why does the new pair seem clearer but cause dizziness?
The clarity you experience with the new glasses could be due to the quality of the lenses or the coatings applied to them, which might enhance contrast or reduce glare. However, if you feel dizzy or experience headaches, it may indicate that the lenses are not properly aligned with your visual axis or that the prescription, despite being the same, does not match your current visual needs. This misalignment can cause your eyes to strain as they work harder to focus, leading to discomfort.

3. Will continuing to wear the new glasses worsen my eyesight?
Wearing glasses that cause discomfort or visual strain does not directly worsen your eyesight, but it can lead to eye fatigue and discomfort. If your eyes are constantly straining to adjust to the new lenses, it may lead to temporary visual disturbances. However, it is essential to address the discomfort. If the new glasses are causing significant issues, it would be wise to consult with an optometrist or ophthalmologist. They can reassess your prescription and the fit of your glasses to ensure they are suitable for your needs.

In summary, the discomfort you are experiencing with your new glasses could stem from several factors, including lens design, frame fit, and potential misalignment. It is crucial to give your eyes some time to adjust, but if the discomfort persists, seeking professional advice is recommended. An eye care professional can help determine if the prescription needs adjustment or if the lenses need to be remade to better suit your vision.
Additionally, consider that prolonged use of glasses that cause discomfort may lead to habits that could strain your eyes further, such as squinting or improper head positioning. Therefore, addressing these issues promptly is essential for maintaining your eye health and comfort.

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