Adjusting to New Glasses: Why New Glasses Feel Strange at First

• New glasses may initially cause temporary symptoms such as headache, eye strain, dizziness, or distorted vision as the eyes and brain adjust to a new prescription.
• The adaptation period can take anywhere from a few days to a couple weeks, especially for first-time glasses wearers, changes in prescription, or changing from standard lenses to progressive or multifocal lenses.
• Consistent wear, proper frame fitting, and correct viewing habits can help speed up the adaptation process and improve comfort.

Most people will find that they can adapt to new glasses within the first few days. However, the adjustment period varies greatly among individuals. It can sometimes take up to a couple weeks for the vision to settle.

Our visual system becomes very accustomed to old prescriptions or previous viewing habits. When a new prescription is introduced, especially one that provides sharper and more accurate vision, the brain requires time to recalibrate and relearn how to interpret the visual information correctly.

When new glasses are first worn; clear vision is to be expected – so long as the prescription is correct. However, some temporary discomfort may occur. This is because the eyes and the brain are still learning how to process the updated visual information.

During this adaptation period, you also might experience:

• Eye strain and discomfort
• Headache
• Dizziness
• Distortions in vision (e.g. floors or walls appearing tilted or curved)
• Altered depth perception (e.g.  walking up or down stairs)

Several factors can influence the time it takes to get accustomed to new lenses.

Changes in lens prescription should result in noticeably clearer, sharper vision compared to a previous prescription. At the same time, the greater level of detail can sometimes appear overwhelming and fatiguing. Although this improvement is beneficial, the brain still needs time to adapt to the new level of clarity. Individuals who require higher degrees of vision correction (e.g. significant astigmatism) may require a longer adaptation period.

Changes in lens design can affect how vision feels, for example, changing from standard, single vision lenses to a more complex design such as progressive/multifocal. Compared to single vision lenses, which have a simple design consisting of a single optical power for the entire surface of the lens, multifocal lenses have multiple powers to enable different types of vision (i.e. near and far). The trade-off is that these lenses come with a learning curve and require different viewing habits.

Changes in frame shape and size can also influence adaptation. A larger frame comes with a larger field of vision and cause distortions in the periphery to become more noticeable at stronger prescriptions. Similarly, frames with significant front curvature or frames with irregular rim shape (e.g. aviator) may affect the viewing experience. Ill-fitting frames may align poorly with the eyes, causing the lenses to be off-centre.

If the same glasses have been worn for several years before changing to a new one, an adjustment period is almost inevitable. The brain becomes highly attuned to a visual environment created by that specific prescription, lens design, and frame position. When changing to a new pair, especially after a long period, the visual system may require more time to adjust to the new viewing experience.

When adapting new glasses, here are some useful tips:

• Wear them consistently: It is best to wear the new glasses straight away, and wear them consistently throughout the day. Avoid switching back and forth between old and new glasses, as this may slow down the adaptation process.
• Allow short breaks if needed: If you experience discomfort, remove the glasses, allow yourself a short break, and try again. Avoid stopping wear completely unless advised by your optometrist.
• Ensure the frames are fitted comfortably: Often, poor vision and/or discomfort can arise from the frame rather than the lens itself. Ensure that your new glasses have been adjusted correctly to your face, e.g. that the frames are not sitting too high or low. Frames can be easily readjusted at your nearest optical practice.
• Use proper viewing habits: When switching from single vision lenses to a different optical design (e.g. multifocal/anti-fatigue lens/myopia control), different viewing techniques may be required to get the most out of the vision.
• Be patient: Adapting to new glasses is a learning process that takes up to a few weeks. If the wearing comfort improves gradually day by day, this is a sign that you are progressing through the adaptation phase.