ISSN: 1391 - 0531
Sunday, April 22, 2007
Vol. 41 - No 47
Plus

Islandwide vision

By Kumudini Hettiarachchi

Every five seconds one person in the world goes blind, while a child goes blind every minute. These are the tragic statistics worldwide, the irony of which is that 75% of this blindness is treatable and/or preventable.

What of Sri Lanka?“The main cause of blindness is cataract. We have also identified four other emerging diseases to be tackled on a priority basis. They are glaucoma, diabetic retinopathy, childhood blindness and refractive errors and low vision,” says Consultant Ophthalmologist Dr. Mangala Gamage stressing that the need is to detect and treat them at the correct time. “This is also the objective of the Vision 2020 initiative.”

Dr. Mahipala

‘Vision 2020: The Right to Sight’ is a global initiative of the World Health Organization and the International Agency for the Prevention of Blindness launched in 2000, to prevent and control avoidable blindness in the world by the year 2020. Sri Lanka is a signatory to Vision 2020.

And the strategy to be adopted in achieving this goal, according to Dr. Gamage, will start right at the grassroot level, with comprehensive plans being drawn up to integrate primary eye care into the primary health care programme of Sri Lanka.

Adds the Deputy Director-General of Public Health Services Dr. Palitha Mahipala, having a time-tested and very successful model for Southeast Asia, in Sri Lanka’s public health system which deals effectively with other diseases, it is essential to integrate primary eye care into this.

Pointing out that the health care service in Sri Lanka can be broadly divided into two categories – preventive and curative – he explains that the primary health care unit (on the preventive side) ranging from the Medical Officer of Health right down to the health care worker who visits homes, should be mobilised to identify eye problems and direct those who need treatment to a health institution (on the curative side).

“The need is to train those at the grassroots or community level to identify simple eye problems for which first-aid can be given in homes themselves along with advice to families on how to prevent home accidents which could lead to blindness,” echoes Dr. Gamage. “They should also be trained to assess the cases which need urgent or routine referral to the closest healthcare institution.”

The horror of a cracker: A child gone blind

That would be the closest dispensary, peripheral unit or rural hospital dubbed the primary healthcare institutions from where the patient gets into the hospital system depending on the gravity and urgency of the eye problem, explains Dr. Mahipala detailing the chain as secondary (district and base hospitals) and tertiary care (general, provincial and teaching hospitals).

“Nearly all provincial, general and base hospitals now have eye surgeons, except for a few, so a good referral system is a must,” says Dr. Gamage, adding that then the centre of excellence for eye care and treatment, the Eye Hospital in Colombo could deal with the complex cases. Adequate manpower at community level and good training programmes for them, she points out, would be essential while in hospitals there should be infrastructure and equipment.

Another vital aspect is making people aware of injuries and infections which could lead to blindness, most of which would be preventable, says this Eye Surgeon citing the example of those engaged in certain types of livelihoods being educated on the need to wear protective gear.

Dealing with childhood blindness through accidents which are 100% preventable, she says once again awareness programmes are important. For childhood eye diseases, the screening procedure should be strengthened. “We have screening of children in schools, which we must develop more while we need to begin screening programmes at pre-school level too,” she stresses.

Last week, Sightsavers International, a charity based in the United Kingdom that works in more than 30 countries in Asia, Africa and the Caribbean to prevent blindness, held a Workshop on Regional Primary Eye Care, in collaboration with the Health Ministry to share experiences, and document lessons learnt and best practices.

Sightsavers also committed to Vision 2020, has been working in Sri Lanka since 1980 and has been contributing to the development and expansion of facilities to prevent blindness.

National Plan

The new National Plan of Action for the Prevention of Blindness is to be presented to the Ministry of Health in three weeks, The Sunday Times learns.

The National Plan which has been in force since the 1990s has been revived and changed to suit current needs, says Dr. Mangala Gamage.

The Steering Committee of Vision 2020 in collaboration with the College of Ophthalmologists has been hard at work, meticulously detailing all aspects that need to be covered in the new National Plan, it is understood. The committee chaired by DDG Public Health Services, Dr. Palitha Mahipala, comprises other representatives of the Health Ministry, five Consultant Ophthalmologists of the College of Ophthalmologists, Provincial Directors of Health, representatives of the Association of Ophthalmic Technologists and members of NGOs in the field.

With regard to statistics on blindness in Sri Lanka, Dr. Gamage says a scientific survey based on random sampling is now being carried out in the Central Province in collaboration with the University of Adelaide, Austalia, and figures will be available very soon. “In the 1980s although a study based on an eye camp was done that data needs to be updated nearly three decades later and the Central Province survey would be a good indicator on blindness across the country.”

 

The curables

The eye diseases which have been identified to be dealt with on a priority basis:

  • Cataract – A cloudiness of the eye lens, which stops light from entering the eye and leads to blindness. This is the world’s leading cause of blindness and around 17 million are blind due to cataract. A simple 20-minute operation to replace the cloudy lens with a plastic one can restore sight.
  • Glaucoma – Glaucoma is the name for a group of diseases that can destroy the optic nerve, the main nerve of the eye. Glaucoma means "hard eyeball" and can lead to irreversible blindness. Even though glaucoma cannot be cured, it can be treated. If it is spotted in its early stages, before any sight is lost, blindness can almost always be prevented. Regular eye examinations are a must especially for those who have a family history of the condition and also those over age 40. During the early period, patients will not have any symptoms. There will be gradual loss of visual field, later loss of central vision as well. Frequent change of spectacles and in the case of those driving vehicles frequent accidents could be an indication of the loss of the visual field.
  • Diabetic retinopathy – Diabetic retinopathy is a complication of both Type 1 and Type 2 diabetes. When blood glucose levels remain too high for a long period of time, changes can occur in the tiny blood vessels that supply the retina of the eye. Early changes will not cause any symptoms and regular eye examination is essential for detection of these changes. A person may notice strange blotches, blurriness, or dark spots in their vision later. If this happens, a visit to an eye doctor is extremely important. If retinopathy is not treated it can lead to blindness
  • Childhood blindness – The main causes of childhood blindness could be either congenital or infection. Vitamin A deficiency, through either malnutrition or diseases such as measles or rubella, cataract and low vision could lead to childhood blindness. There are 1.4 million children who are blind worldwide. Simple steps such as immunization, treatment of infections and early screening could prevent childhood blindness. Pre-term/low birth weight babies too have to be screened immediately to detect Retinopathy of Prematurity (ROP) which is another emerging cause of blindness.
  • Refractive errors and low vision – Refractive errors include myopia (short-sightedness) and hyperopia (long-sightedness) with or without astigmatism (when the eye can sharply image a straight line lying only in one meridian). Low vision is visual acuity less than a certain specification by the WHO. There are an estimated 124 million people in the world with low vision. Refractive errors can be rectified with appropriate optical correction while people with low vision maybe helped with low vision devices.
 
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Copyright 2007 Wijeya Newspapers Ltd.Colombo. Sri Lanka.