Eye strain

What is Eye strain?

Asthenopia (aesthenopia) from the Greek word "asthen-opia : ασθεν-ωπία" or eye strain is an ophthalmological condition that manifests itself through nonspecific symptoms such as fatigue, pain in or around the eyes, blurred vision, headache and occasional double vision. Symptoms often occur after reading, computer work, or other close activities that involve tedious visual tasks.

When concentrating on a visually intense task, such as continuously focusing on a book or computer monitor, the ciliary muscle tightens. This can cause the eyes to get irritated and uncomfortable. Giving the eyes a chance to focus on a distant object at least once an hour usually alleviates the problem.

A CRT computer monitor with a low refresh rate (<70Hz) or a CRT television can cause similar problems because the image has a visible flicker. Aging CRTs also often go slightly out of focus, and this can cause eye strain. LCDs do not go out of focus and are less susceptible to visible flicker.

A page or photograph with the same image twice slightly displaced (from a printing mishap, or a camera moving during the shot as in this image) can cause eye strain by the brain misinterpreting the image fault as diplopia and trying in vain to adjust the sideways movements of the two eyeballs to fuse the two images into one.

Questions and answers on "Eye strain"

hi doctor.i am 26 year old mother of 2 year old baby .not having my periods yet.i was having gastritis problem and fatty liver problem 3 months...

doctor1 MD

Dear Friend.
I would like to know how were you diagnosed to have fatty liver.
Was it associated with pregnancy? There is a condition called as...

Read Full Thread   Ask a Doctor Now

I have a bllod blister on my eye, I have not banged it or caught it with anything but have recently been suffering with severe headaches and eye...

doctor1 MD

there is nothing like blood blister. it can be sub cojuctival hemorrhage. at times it appears spontaneously may be due to cough constipation....

Read Full Thread   Ask a Doctor Now

my age is 25 i am masturbating since my 13 th year, maximum i masturbate 4 times a week , nearly 13 years i masturbated, some problems which i have...

doctor1 MD

Brief Answer:
Not related to mastrubation

Detailed Answer:
Hi,

I have heard many young men like you who have misconception about mastrubation....

Read Full Thread   Ask a Doctor Now

Recent questions on  Eye strain

doctor1 MD

Hi I am having -1.25 power on my left eye and 0.5 cylindrical power on my right eye I don't want to use spects and I am using lenses from many...

doctor1 MD

Hi, I work in XXXXXXX in 6pm -3 am shifts. I have been having frequent/regular headaches esp. between the eyes from past few months (2-3). It had...

doctor1 MD

I'm 67 year old male, with otherwise normal vision. For the past month, I would wake up with a clear vision, and then as the day progresses, it...

doctor1 MD

I am a 23 year old woman, 5'4, and I weigh about 135 pounds. I have been diagnosed with PCOS, and I am currently taking Diane. It has certainly had...

doctor1 MD

I have been battling herpes (1&2) for over a year now. My symptoms include almost total fatigue, random spots (coldsore-esk, not lesions). When I...

doctor1 MD

On Thursday, March 27, I am 58. I started having symptoms of chronic hives and swelling at 17. I was diagnos with beginning stage of Lupus on my...

doctor1 MD

I have a bllod blister on my eye, I have not banged it or caught it with anything but have recently been suffering with severe headaches and eye...

Ask Question
Doctor Image
MD

Hi, I am Dr. Andrew Rynne (Family Physician). I will be guiding you through the process. Please write your question below.

Related Drugs/Medications
Related Treatment/Therapy
Related Procedures
Related Medical Topics