Dizziness when wearing colored contact lenses is usually caused by the following reasons: initial discomfort with wearing contact lenses, incorrect prescription based on spectacle lens power, uncorrected astigmatism or deep myopia, and differences in lens material. Here are the specific reasons:

1. Initial discomfort with wearing contact lenses

Some people have sensitive eyes and cannot adapt to wearing contact lenses immediately. The first time they wear them, they may experience discomfort such as dizziness. If both the lens and the eyes are confirmed to be fine, the dizziness will usually disappear after five to six days of adaptation.

2. Incorrect prescription based on spectacle lens power

There is a difference between the power of spectacle lenses and contact lenses. The higher the power, the more obvious the difference. Therefore, when prescribing contact lenses, it is important not to simply use the power of spectacle lenses as a reference. Generally, the power of contact lenses should be about 50 degrees lower than that of spectacle lenses. Prescribing contact lenses based on the power of spectacle lenses can easily lead to dizziness.

3. Uncorrected astigmatism or deep myopia

Dizziness when wearing contact lenses may be caused by uncorrected astigmatism or deepening myopia. In such cases, it is recommended to undergo a new eye examination and select the correct power. It is important to ensure that the lens power matches the refractive power of the eyes to ensure a comfortable and clear vision.

4. Differences in lens material

Differences in lens material, thickness at the center, and hardness can also cause dizziness when wearing contact lenses. For example, wearing hydrogel lenses for the first time may cause dizziness, blurred vision, or irritation to the eyes. This is mainly due to the fact that the actual refractive power of the eyes has not changed, but the particularities of the lens and its design have affected the lens power.