Your New Glasses: Why Do Your Eyes Feel Foggy? - Ophthalmology

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Hello Doctor: I am 22 years old and recently got a new pair of glasses.
My previous prescription was -4.00 for the left eye and -4.50 for the right eye.
The new glasses are -4.50 for the left eye and -5.00 for the right eye.
The optical shop used my old glasses to measure the prescription and added an additional -0.50 to each eye during the measurement.
I did have an eye exam.
Now, when I wear the new glasses for a short time and then take them off, my vision feels foggy, almost like seeing through smoke.
I am very worried about whether this could harm my eyes.
A friend recommended this place, but I feel it was done rather casually.
I hope you can provide some answers.
Thank you.

pyu, 20~29 year old female. Ask Date: 2002/07/15

Dr. Wang Zhangji reply Ophthalmology


Assuming your glasses prescription is correct, your eyes are in a completely relaxed state when you wear them.
Therefore, when you take off your glasses, the ciliary muscles cannot adjust immediately, resulting in a blurred vision.
If you are concerned, you can bring your glasses to the clinic for an examination.

Reply Date: 2002/07/15

More Info


When you experience a foggy or hazy vision after wearing new glasses, it can be concerning, especially if you have recently changed your prescription. There are several factors that could contribute to this sensation, and understanding them can help alleviate your worries.

Firstly, the adjustment period to new glasses is quite common. When you switch to a new prescription, your eyes and brain need time to adapt to the changes in lens curvature and power. This adaptation period can vary from person to person, but it typically lasts a few days to a couple of weeks. During this time, you may experience visual disturbances such as fogginess, distortion, or even headaches. This is especially true if the new prescription is significantly different from your previous one.

In your case, you mentioned that your new prescription has increased by 50 degrees in each eye. Such a change can be substantial, particularly for someone who is already wearing corrective lenses. The brain may initially struggle to process the new visual information, leading to sensations of fogginess or blurriness. It is essential to give your eyes time to adjust, but if the foggy vision persists beyond a couple of weeks, it would be advisable to revisit your optometrist or ophthalmologist for a follow-up examination.

Another factor to consider is the quality of the lenses themselves. If the lenses were not manufactured correctly or if there are imperfections in the lens material, this could lead to visual distortions. It’s crucial to ensure that your glasses are made from high-quality materials and that they are properly fitted to your face. Poorly fitted glasses can cause discomfort and visual issues, as they may not align correctly with your line of sight.

Additionally, if you have any underlying eye conditions, such as dry eyes or astigmatism, these could exacerbate the feeling of fogginess when wearing new glasses. Dry eyes can cause temporary blurriness, and if your new lenses are not accommodating for your specific needs, this could lead to discomfort. If you suspect that dry eyes may be an issue, consider using lubricating eye drops to help alleviate the symptoms.

It’s also worth noting that environmental factors can play a role in how your vision feels. For instance, if you are in a dry or air-conditioned environment, this could contribute to a feeling of fogginess. Make sure to stay hydrated and take breaks from screens to reduce eye strain.

Lastly, if you are feeling uncertain about the quality of the service you received when getting your new glasses, it’s perfectly reasonable to seek a second opinion. A reputable optometrist or ophthalmologist can provide you with a thorough examination and ensure that your prescription is accurate and appropriate for your needs.

In summary, experiencing foggy vision after getting new glasses can be attributed to several factors, including the adjustment period to a new prescription, lens quality, underlying eye conditions, and environmental influences. If the fogginess persists or worsens, it is essential to consult with an eye care professional to rule out any potential issues and ensure that your vision is properly corrected. Your eye health is paramount, and seeking clarity on these concerns is a proactive step towards maintaining it.

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