Fluctuating Vision: Causes and Solutions for Eye Health - Ophthalmology

Misjudgment of eye prescription and concern about the increase in the degree of myopia?

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Hello Doctor,
I am nearly 34 years old this year.
Since childhood, my family strictly limited my reading, writing, and television viewing distances.
During fifth and sixth grade, when I loved reading the most, I did not have myopia.
However, during middle school, the educational environment pressured me to the point where I lost interest in extracurricular reading.
At 15, I entered a vocational school that I did not want to attend, and I only managed to get in after cramming for the entrance exam a month prior.
Consequently, I gave up on my studies.
At 16, I inexplicably developed myopia (I spent most of my classes sleeping or chatting).
By early 17, I had to take a leave of absence from school.
At that time, an eye exam showed approximately -2.50 and -5.00 diopters with astigmatism of -2.50 and -5.00.
I remember that during a follow-up appointment, my myopia had changed to -3.00 and -2.50 with astigmatism of -5.00.
I was prescribed glasses, but I could not get used to them, so I only wore them when going out at night.
About two months later, my vision improved.
During a two-day, one-night health check at 17, my left eye was 0.9 and my right eye was 1.2 (uncorrected vision).
The examination of my eyelids, conjunctiva, cornea, pupils, lens, eye muscle movements, and fundus were all normal, with no astigmatism.
The doctor noted that I had myopia since my vision was less than 0.9, approximately -2.50.
By mid-18, I again experienced unexplained vision problems.
At that time, I was not working; my previous job was selling clothes.
I was advised to get contact lenses.
At the optical shop, my prescription was around -3.00, but since they did not have that strength, the staff suggested -4.00, saying it would not matter because contact lenses look very natural.
From then on, I frequently wore contact lenses (I was young and did not understand).
I also started wearing the glasses I had at 16 (only at home).
Over the next three years, my glasses would inexplicably break, and I would have to get my prescription checked each time (I only wore glasses at home, and it was not due to an increase in prescription).
The contact lens prescriptions changed according to the refraction results:
- At 21: R -4.00, L -4.00, astigmatism -2.50
- At 24: R -4.00, L -4.00, astigmatism -2.50
- At 26: R -6.00, L -6.00, astigmatism -2.50
- At 27, I got a new pair of glasses because the previous ones were too bright, but the prescription was too high, so I set them aside and continued wearing the pair from 26: R -6.00, L -6.25, astigmatism -1.00 (I forgot to change the prescription back to -6.00 for contacts due to work).

- At 29, during a simple health check, my uncorrected vision was R 0.6, L 0.63.
- At 32, I frequently wore glasses, which broke again: R -4.00, L -4.25, astigmatism -1.00...
I switched back to -4.00 for contact lenses (2016).
- At 33, I discovered some issues with my eyes.
I have never had an increase in prescription due to worsening myopia.
In June, I visited three eye clinics for examinations:
- Clinic A: Retinal examination showed R -4.00, L -4.00, both 1.0...
but my binocular vision showed increased prescription.
Further examination showed R -4.25, L -4.50 (with contact lenses at -4.00).
- Clinic B: R -4.00, L -4.00, both 1.0, binocular vision 1.2, astigmatism -0.75.
- Clinic C: R -4.00, L -4.25, astigmatism R -0.75, L -1.00.
I returned to Clinic A for a dilated examination: R -4.00, L -4.25, astigmatism both -2.50.
About two weeks later, I went to Clinic B to get a prescription: R -3.25, L -4.00, astigmatism both -2.50.
In November, I took my glasses to Clinic B for another refraction, which showed R -3.25, L -4.00, astigmatism -2.50 (examining both the glasses and my eyes again).

On January 11, 2017, due to discomfort and worsening astigmatism, I went to Clinic D for a refraction: R -4.25, astigmatism -1.25, L -4.50, astigmatism -1.00.
On January 17, I visited Hospital E: R -4.25, astigmatism -1.25, L -4.00, astigmatism -1.25...
but due to abnormal readings, I underwent dilation, and the prescription remained the same.

I would like to ask why my eyes have changed so rapidly in a short period after I started paying attention to my eye issues?! Every clinic says my eyes are normal, and the hospital has scanned my eyes.
I originally did not have astigmatism, especially since my health check report at 17 showed no astigmatism.
My vision has always been good; I could distinguish classmates from 100 meters away (I was on the track team in sixth grade).
I believe that my myopia and astigmatism are due to refraction errors.
I want to know if, aside from these two recent refractions, my vision can be improved? I have always maintained good eye habits and am not a computer worker.
I rarely watch television, using the computer and phone for about 3-4 hours a day, taking breaks for my eyes.
However, why has my astigmatism worsened this past month? Doctors say my eyes are normal, and my family has no myopia; my two younger brothers also have good vision.
I take great care of my eyes! I just did not pay attention to the prescription issues before.
I listened to what the doctors and optometrists said...
Please take the time to answer my questions.
Can my vision be improved? What is causing the recent worsening? Please help!

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Xiao Yang, 30~39 year old female. Ask Date: 2017/01/17