Why am I dizzy and disgusting when I wear frame glasses?

Abstract: the final prescription of glasses depends not only on accurate inspection and measurement technology, It also depends on whether we have the organic combination of fitting experience and scientific judgment (i.e. medical optometry and scientific glasses). We should ensure that patients have clear vision, can use their eyes comfortably and read for a long time after wearing.

cause analysis is as follows:

  1. Visual fatigue caused by deviations in the degree, astigmatism axis, pupil distance, pupil height and wearing mode of frame glasses.

and

analysis: dizziness and nausea may occur if the degree of frame mirror is too large or too small, especially when the degree is too large;

similar symptoms may occur if the astigmatism or axial direction is wrong; In addition, whether spherical or aspherical lenses, prism effect will occur because the thickness of the center and periphery of the lens is different. Therefore, we should try to accurately measure the pupil distance and pupil height during fitting, Make the optical center of the lens parallel and consistent with the visual axis (roughly speaking, the line of sight direction) to minimize the discomfort caused by the prism effect;

even if the above reasons are excluded, the glasses are worn in an incorrect position, and the patient will see things not through the optical center of the glasses, but through the edge of the glasses, which will also cause dizziness and nausea.

  2. There is a big difference in the degree of both eyes.

analysis: A. for patients with binocular simultaneous vision (primary visual function), there is a distance between the

frame lens and the highest point of the wearer’s black eye, which is called “apex distance” , due to this distance, the imaging size of external objects on the retina will change, that is, aberration. The greater the degree of myopia, the smaller the image will become. When the size of the image of both eyes changes by more than 5%, There will be problems with the brain’s fusion function (secondary visual function). The brain can’t fuse the two images of both eyes into one to form diplopia, resulting in dizziness and nausea.

B. for patients with impaired simultaneous visual function (primary visual function),

Due to the great difference in the degree of both eyes, usually only the eye with good eyesight can see things. Over time, the unused eye will have form deprivation amblyopia, and then exotropia, Abnormal retinal correspondence was formed (the imaging of one eye deviated from the macular fovea), when we matched the patient’s eyes with appropriate glasses (the vision of both eyes is the same or close), the patient’s visual function recovers at the same time, but the abnormal retinal correspondence still exists for a short time, which will also form diplopia and dizziness and nausea. However, this situation generally disappears for a period of time (usually 1-2 weeks), because the normal retinal correspondence will form soon, and diplopia will disappear.

  3. Individuals are very sensitive to the aberration, visual field limitation and prism effect caused by frame glasses, which may cause dizziness and nausea.

  4. Dizziness and nausea may also occur when wearing frame glasses for the first time or changing frame glasses with different parameters, but as long as the parameters are appropriate, the duration will disappear in a short time.

note: the final prescription of glasses depends not only on accurate inspection and measurement techniques, It also depends on the organic combination of fitting experience and scientific judgment (i.e. medical optometry and scientific glasses). We should ensure that patients have clear vision, can use their eyes comfortably and read for a long time after wearing.

if the above symptoms persist and cannot be tolerated, they can choose contact lenses, especially hard contact lenses (RGP) is better. The introduction is as follows:

frame lenses are especially suitable for patients with obvious discomfort, high myopia, large astigmatism, irregular astigmatism (trauma, after corneal transplantation or after excimer laser surgery), keratoconus and aphakia.

RGP advantages are summarized as follows:

  1. Good visual quality, almost no expansion, reduction, deformation and prism effect of retinal image.

  2. Wide field of vision, unlike frame glasses, the field of vision is limited.

  3. Less complications, safer for eye health. For example, the incidence of giant papillary conjunctivitis, chronic corneal hypoxia, dry eye and infection is much lower than that of soft contact lenses.

  4. It can reduce the peripheral retinal defocus and delay the rapid development of myopia.

  5. Because it is a hard lens, it is durable and low cost. The service life of a pair of lenses is 2 years.

  6. It will not produce fog under temperature difference or other special conditions like frame glasses, which is inconvenient for work, study and life.

  7. It can delay the deterioration of keratoconus.