People are unaware that their eyes may have focusing issues and muscle function issues as well as health issues which require attention.
Blurred vision is not something to be ignored.
Using smart phones and computers are actually affecting posture, and general physical health.
They are used for retrieving information for SELF HELP however can cause catastrophic issues as well.
Attention to driving vs talking on the phone.
As well as relying on information not specific to your concern.  Seeking information about eye health and care which seems like a symptom you may have and self help can actually make things worse.
Self diagnosis can develop into greater concerns for your health and well being.