Pathological myopia and retina

[Mr_ink]

Hello.I have myopia in my eyes .My left eye is -3 and my right eye is -2.75 and I am 18 years old.
My left I hasn't changed for one year and ten month and my right eye increased 0.5 D in one year and ten month..
I have some questions.
1.Is this range of myopia make the retina thin?
2.In which range of myopia the retina becomes thin .Should it be pathological myopia to make it thin?
3.sholud i do any special care of my eyes.Is using dumbles and running with high speed make my retina thin or weaken?
4.How many percent of people with myopia have pathological one?
Thanks in advanced.

[SoftwareDeveloper]

I suppose we should explicitly say that there should be need to take special care regarding physical activities with myopia in that range, unless your doctor has told you that you have some other eye health issue that you didn't mention. Its rare that even fairly  high myopes need to consider taking special precautions, I was -9.5D and -6D (before cataracts&surgery corrected that) and it didn't impact my activities. Doctors usually make sure patients are aware of such things if they are at risk.

[SoftwareDeveloper]

Each person is different, the odds are your vision will stabilize in the next few ears since it isn't within the range considered likely to be "pathological". This site says:

http://www.webmd.com/eye-health/tc/nearsightedness-myopia-topic-overview
"Nearsightedness usually stops getting worse by age 20. Most nearsightedness stabilizes at a mild to moderate level."

Though others suggest some change up to 25, though there can be slow changes over time afterwards, everyone is different.

Most sources describe up to -3D as mild myopia, which is fairly common and increasing all the time:

http://www.allaboutvision.com/parents/myopia-progression.htm
"The severity of nearsightedness is often categorized like this:

Mild myopia: -0.25 to -3.00 D
Moderate myopia: -3.25 to -6.00 D
High myopia: greater than -6.00 D
Mild myopia typically does not increase a person's risk for eye health problems."

https://www.wikiwand.com/en/Myopia
"Low myopia usually describes myopia of −3.00 diopters or less...

Myopia is common in the United States, with research suggesting this condition has increased dramatically in recent decades. In 1971–1972, the National Health and Nutrition Examination Survey provided the earliest nationally representative estimates for myopia prevalence in the U.S., and found the prevalence in persons aged 12–54 was 25.0%. Using the same method, in 1999–2004, myopia prevalence was estimated to have climbed to 41.6%. ..."

http://www.healthofchildren.com/M/Myopia.html
"Less than 5 percent of five year olds are myopic, but this percentage increases to 25 percent by late teens and to approximately 35 percent for young adults and to 42 percent of those middle-aged. "

[CBCT]

You don't need to worry.  The prescription for your left eye is mild myopia, and the right eye is at the very bottom range of moderate myopia.  A prescription change of .5D is not dramatic.  Best wishes.