Improving astigmatism

[Mehdi_M]

Good day,
I have nearsightedness ( -3 in both eyes) and 0.5 degree of astigmatism, but recently when I blink abit fast or when I close my eyes for 2 or 3 seconds and then open them , for a short while (about 1 minute) everything is clear and not blury.Also when I checked my vision during this clear flash i could read the letters to the fifth line (snellen chart).in other words in this situation my eyes have only -0.5  degree of nearsightedness.What is causes this?
Is it a sign of improvement?
Thanks for your answer in advance.

[Houman Vosoghi, MD]

Not a sign of improvement but the effect of your blinking and tear film changes on the refractive error of your cornea.  It may also be a sign that you are overaccomodating.  If you are young, the last is a possibility.  You may want to be rechecked for glasses and overplus technique should be used to see if you are doing this.

HV

[Houman Vosoghi, MD]

People in their 20s and younger sometimes overaccomodate making their vision blurry at distance.  This gets better with eye rest/relaxation.  Not very common/likely so I wouldn't worry about it.  Your eye doctor could check for this by what is called the overplus technique.  They will know what I am talking about if you tell them.

HV

[Mehdi_M]

thanks for your answer, but I did close my eyes for a white to rest them long befor, it is my habbit and at that time nothing happened.
Sorry ,what do you mean by this "If you are young, the last is a possibility"?
And I've to note I also happens when I close my eyes and move them to left or right and then open them.