Can a mirror correct astigmatism? Low astigmatism can also play a certain corrective role.
If myopia is accompanied by astigmatism, the cornea is regular. Conventional orthokeratology can correct the compliant astigmatism in the range of-150 degrees.
If it is because of the asymmetry of corneal morphology and large astigmatism range, a biaxial lens is needed. Because of the particularity of orthokeratology lens design, the lens positioning arc is close to the peripheral area of cornea. Therefore, for some children with small astigmatism and close to the corneal apex, it is not necessary to use biaxial (astigmatism) lenses.
Therefore, the main purpose and function of biaxial design of corneal plastic surgery (astigmatism) is to better match the corneal morphology. When choosing the design, the optician does not completely determine whether the biaxial design is needed according to the optometry results, but judges whether the patient needs to wear the biaxial design orthokeratology lens according to the patient's corneal morphology, that is, corneal topographic examination.
Can lenses cause astigmatism to deepen? Wearing orthokeratology will not aggravate astigmatism, because orthokeratology can shape the cornea and remove some corneal astigmatism. So they will not aggravate astigmatism, but will reduce astigmatism. Astigmatism only occurs when glasses are out of alignment. Get better after stopping wearing or correcting.
Because the current data for many years does not show that wearing plastic glasses leads to an increase in astigmatism. Most astigmatism is naturally formed, which is less affected by the later period and usually keeps a certain range of fluctuations. However, sometimes children wearing plastic glasses will have temporary astigmatism. This situation is related to the deviation of lens degree and children's sleeping habits at night, and will recover after stopping using lenses.
I suggest you adjust your sleeping habits and living habits. Usually you can't stay up late, pay more attention to eye hygiene, try not to rub your eyes to avoid bacterial infection. Read enough time lines, read correctly, watch less electronic products and pay more attention to details, so that diseases will not come to you.
How to wear ok glasses 1 First of all, prepare a clean empty bowl (mainly used to hold leaked liquid), nursing liquid, mirror, contact lens box, napkin, and of course, the most important thing is to have a pair of clean hands!
2. When you are ready, open the nursing liquid cover to ensure one-handed operation. The left hand sticks out the tile, and the right index finger takes out the OK mirror from the glasses case and puts it on the palm of the left hand.
3. Pick up 5-6 drops of nursing solution in the right hand and put it on the left hand OK mirror. Light it with your right hand! Just wiping those who tried to clean the OK mirror led to the failure of the OK mirror.
4. After cleaning the ok mirror, look at the mirror, stick the index finger of the right hand to the OK mirror, drop the nursing liquid into the OK mirror with the left hand, then open the eyelash root of the upper eyelid with the left hand, and open the eyelash root of the lower eyelid with the right hand, gently aim the lens on the index finger of the right hand at the dark circles, and then loosen the upper and lower eyelids after ensuring the correct position of the lens.
After completing the above steps, close your eyes and rest for 1 minute, feel whether your eyes are wearing OK glasses, and then you can go to sleep.
Tips: OK glasses are not recommended in the following situations:
1. Cold, fever, decreased resistance;
2. discomfort such as redness, swelling and pain in the eyes.