Oct 4, 2017 | Blog, Eyes and Vision

image credit:

Watching TV or computer for too long causes eye strain and dry eyes. The symptoms are called Computer Vision Syndrome (CVS). This happens because the eye focusing ciliary muscle works hard (contracts) when looking for near. After looking near for too long, you get ciliary spasm (like muscle cramp) causing eye discomfort or even headache. In addition, weblink 30% less when reading or concentrating too hard at something. Blinking less results in less tears being produced by the eyes causing dry eye symptoms such as sandy or gritty feeling. Young children who play games on their mobile devices or read a lot tend to start wearing glasses at a younger age for myopia (short-sightedness).

To avoid this, remember the 20-20-20 rule. Namely, take a 20 second break after 20 minutes concentration to look at 20 feet away (considered infinity distance) whereby the eye focusing muscle is most relaxed.



Do not look at your phone in the dark for long periods because the our pupils (like a camera aperture) dilate in the dark. This means a lot of light get into the eyes and brain. The blue light emitted by the phone reduces the amount of melatonin and affected our sleep pattern. If you really need to look at your phone at night, either reduce the brightness of the phone or turn on some background light.



Do protect your eyes from harmful UV light. Excessive sunlight can cause corneal dryness and an eye growth called pterygium which is very common in fisherman, sailors and mountaineers. At the sea or snow covered areas, there is double the amount of UV light coming into our eyes because of the reflection of sunlight from the water and snow. Protect your eyes by wearing UV blocking sunglasses when outdoors for long period of time like playing golf or fishing.



Exercise more because blood flow is good for the eye and brain. The eye is like a camera which sends the images to the brain which is like a computer that analyses the images. A stroke in the brain can also make a person blind even though the eye is functioning normally. Walking 3-4 times a week reduces the pressure in the eye and helps patients with glaucoma (eye condition caused by high eye pressure) improve their eye pressure control.

As we age, there is always wear & tear in our body including the eyes. The retina and macula is a layer of cells in our eye which convert the images we see into electrical signals to be transmitted to our brain. These cells gradually degenerate (die naturally) as we grow older. We can help protect against age-related macular generation by eating more food containing vitamins A, C and E, as well as antioxidants like lutein and zeaxanthin.

Written by,
Dr. Hoh Hon Bing


Generic selectors
Exact matches only
Search in title
Search in content
Search in posts
Search in pages
Filter by Categories
Blood Vessels
Cosmetic & Aesthetic
Diet for Diabetes
Diet for Hypertension
Diet for Kidney Disease
Ear Nose & Throat
Eyes and Vision
Health Screening
Kidney Disease
Liver Disease
Mental Health
Palliative Care
Physiotherapy and Rehab
Travel Medicine
Urologic Disease
Wellness & Anti-Ageing
Women Health

I underwent Lasik surgery in Malaysia and I was able to attend follow-up consultations because I currently live in New Zealand. However, upon returning to New Zealand, I managed to consult my doctor through TeleMe’s online video consultation platform and it went smoothly. I highly recommend TeleMe’s service to everyone !

Jenny Cheng

Patient, From New Zealand

Have queries about your eye condition? Download Teleme App and ask Dr. Hoh today


Dr. Hoh Hon Bing


Dr. Hoh is an Ophthalmologist (LASIK & refractive) with over 15 years of experience who focuses on LASIK Laser Eye Surgery, Cataract Surgery and Lens Implant.