Glaucoma is a disease involving the optic nerves of the eyes- usually affecting both of the eyes. It usually occurs when there is an escalation of pressure in the eyes. Our eyes usually produce a protective fluid (that surrounds the tissues of the eyes) also known as aqueous humour. An optimum eye pressure is achieved when the amount of fluid produced is equivalent to the amount of fluid being drained out of the eyes. If there is any slight blockage in the outflow channel, the pressure in the eyes rises due to the accumulation of the fluid surrounding the eyes.

            There are several distinguished types of glaucoma; one being acute or close-angle glaucoma that is rare and occurs due to a sudden, high increment in the eye pressure which causes pain. Another type being chronic or open-angle glaucoma which occurs gradually and is often left undetected due to the absence of any signs or symptoms. Next, secondary glaucoma is caused by an inflammation of the middle layer of the eyes. Another type of glaucoma would be childhood or congenital glaucoma which is extremely rare and only occurs in very young children due to abnormalities in the eyes.

            A few risk factors increase the chances of developing glaucoma. One of them is family history which means if your parents or siblings have glaucoma, you have a significant risk of developing it as well. Another risk factor would be age– the older you are, the higher the risk of developing glaucoma. Ethnic groups also play a role in increasing the chance of developing glaucoma, in which people who are of Afro-Caribbean and African descent will have a higher risk of developing glaucoma. Other than that, short sightedness can also make you more prone to develop glaucoma. Diabetes also appears to be another risk factor of developing glaucoma.

            Oftentimes, glaucoma goes undetected due to absence of signs and symptoms in the early stages. Given the situation that you have acute or open-angle glaucoma, it will take a long time before your eyesight deteriorates. When a person experiences blurred vision, dull pain around the head, nausea or vomiting or seeing a glare or shadow around the light of a lamp, he or she is usually at a severe level and require guidance from an ophthalmologist with urgency. Therefore for those that have a higher risk for developing glaucoma, it would be advisable to undergo an eye examination yearly. After all, prevention is better than cure.

            Thus, eye tests that are simple and painless should be performed regularly for early detection. Firstly, an eye pressure test in which a local anesthetic eye drop will be placed in both of the eyes before a small instrument is gently placed against your eye to measure the intraocular pressure of the eyes.

                                                                         Eye pressure test  

                            Next, optic nerve examination can be conducted to examine the condition of your optic nerves.

Once damage is done to the vision by glaucoma, it is hardly reversible. However, there are treatments that can prevent the eye-sight from going worse. The go-to treatment for acute or open-angle glaucoma is eye drops that patients need to use for lifelong. In the early stages of glaucoma, these eye drops can help control the eye pressure and therefore prevent further damage to the eyes. The effectiveness of the eye drop will be determined by the ophthalmologist upon regular glaucoma checks. If the use of eye drops is unable to control glaucoma, laser procedures can help to drain the fluid out of the eye effectively or surgery on the draining channel can be performed as well. 

            Certain lifestyle habits can be easily adapted to reduce the severity of glaucoma. Firstly, limit caffeine intake as caffeine can increase the pressure of the eyes. Next, limit alcohol intake as excessive drinking of alcohol can damage optic nerves. Fish oil supplements can help to improve eye health as well. Exercising cautiously can help to improve glaucoma and general health. Other than that, sleeping with your head on a pillow can help to reduce eye pressure as well.

References

1. Ow Yong, S.E. (2021). [Comparison of normal eye with glaucoma eye]. Vista Eye Specialist. https://www.vista.com.my/pages/2021/02/17/glaucoma/
2. Salmon, J. (2015) Glaucoma information for patients. Available at: https://www.ouh.nhs.uk/patient-guide/leaflets/files/11826Pglaucoma.pdf
3. NHS. (2021). Glaucoma. Available at: https://www.nhs.uk/conditions/glaucoma/
4. Glaucoma UK. (2021). Living with Glaucoma. Available at: https://glaucoma.uk/care-support/living-with-glaucoma/
5. Othman, S. (2019). Glaukoma. Available at: http://www.myhealth.gov.my/dewasa-glaukoma/

As the science and technology become more and more developed nowadays, people are unable to live without digital devices like smartphones, laptops etc. Even students are also using smartphone, tablets or laptops for online classes, especially during COVID-19 pandemic, which has increased the exposure to digital devices. The usage of these digital devices has become a huge part of modern life.

But, do you know that, looking at these digital devices for many hours per day can actually cause a significant stress to your eyes and eventually develop into an eye disease. This is known as digital eye strains. This has increased the threat of digital eye strain (DES), making it an emerging public health problem.

Digital eye strains (DES) which also known as computer vision syndrome is defined by American Optometric Association, includes a range of visual and ocular symptoms occurred due to prolonged use of digital devices. Many studies suggest that the following factors are associated with DES, such as:

• screen glare (reflection from the digital display),
• poor lighting from the room or extensively exposure of lighting from the digital display,
• viewing digital screen from a wrong angle or distance,
• uncorrected vision problem (presbyopia, astigmatism, farsightedness),
• smaller font size

Viewing a digital screen for a few hours or more a day, or being too close to the digital device screen or having eye problems but did not correct with glasses or contact lenses, all these can worsen DES or causing recurrent of DES.

The symptoms of DES include eye dryness, eye fatigue, eye discomfort, eye redness, eye itching, blurred vision and headaches etc. The severity of visual symptoms of DES is based on the level of visual abilities and the amount of time spent on looking on the digital screen. Certain visual symptoms are temporary and will go away after the person stop using the digital devices, but some individual may still experience visual symptoms like blurred vision even after stop using digital devices. Symptoms may get worse if no steps taken to resolve the problem.

Treatments maybe vary for DES, but the symptoms can be relieved through optimal eye care and making changes in how the digital screen is viewed. Treatments include:

• After 2 hours of usage of digital devices, rest your eyes for at least 15 minutes
• Every 20 minutes, look into the distance at least 20 feet away from the computer or digital device. Do this for at least 20 seconds.
• Font size used in digital device should be enlarged.
• Digital devices should be positioned in a way to avoid glare, particularly from lighting of the room or lighting from windows.
• Digital devices should be viewed with the eyes looking downward. The digital screens are best to viewed at a 15 to 20 degrees below eye level and a distance of 20 to 28 inches from the screen (about an armlength)
• Remember to blink your eyes more frequently in order to minimize the risk of developing dry eyes when using a digital device as blinking can keep moisture on the eye’s surfaces.

Besides the changes which were stated above, management of eye dryness can help to treat or prevent the recurrent of DES due to dry eyes. For example, the use of lubricating eye drops to relieve the symptom of dry eyes. Lubricating eye drops can help to relieve symptoms of dry eyes, watery eyes or tired eyes, but it cannot completely cure DES, so only use eye drops when the symptoms are persistent. Some studies suggested dietary supplements such as omega-3 fatty acids and bilberry extract can help in relieving the symptoms of DES. These supplements have an important role in preserving the moisture levels in dry eyes conditions.

In conclusion, prevention is the most important step in management of DES. It involves the ensuring of an ergonomic work environment and practice as well as visual examination and eye care to treat visual disorders. Regular visual examinations can help to prevent or reduce the development of DES.

References

1. Chaitra Jayadey, Puja Sarbajan, and Anand Vinekar (2020 Nov) Impact of the COVID-19 pandemic on digital eye strain in children. Indian Journal of Ophthalmology. 68(11): 2383-2384.
2. Gammoh Y (February 26, 2021) Digital Eye Strain and Its Risk Factors Among a University Student Population in Jordan: A Cross-Sectional Study. Cureus 13(2): e13575. doi:10.7759/cureus.13575
3. Pratyusha Ganne, Shaista Najeeb, Ganne Chaitanya, Aditya Sharma, and Nagesha C Krishnappa (2021) Digital Eye Strain Epidemic amid COVID-19 Pamdemic- A cross-sectional Survey. OPHTHALMIC EPIDEMIOLOGY 2021, VOL. 28, NO. 4, 285–292 https://doi.org/10.1080/09286586.2020.1862243
4. Association AO. Computer vision syndrome. Accessed October 14 2020; Available from: https://www.aoa.org/healthy-eyes/eye-and-vision-conditions/computer-vision-syndrome?sso=y
5. Mark Rosenfield (Jan 2016) Computer vision syndrome (a.k.a. digital eye strain). Optometry in Practice 2016 Volume 17, Issue 1, 1–10
6. Chantal Coles-Brennan, Anna Sulley and, Graeme Young. (2019) Management of digital eye strain. Clinical and Experimental Optometry 2019 ;102: 18-29