Retina is the innermost layer of the eyeball comprising of nerve endings and blood vessels. The main function of retina is to receive light, convert it into neural signals and send these signals to the brain for visual recognition.
Retina needs to be examined by the ophthalmologist regularly especially if you have certain systemic or local issues. Some of them are listed below.
High Myopia (Nearsightedness) –
If the refractive error is more than -6.0D , there are chances that retina is overly stretched and that can cause breaks, tears or detachment.
Symptoms to look for – Floaters and Flashes of light
Diabetes –
Diabetic retinopathy (DR) -If blood sugar is poorly controlled, the chance of damaging the blood vessels in the retina is higher. This damage cannot be reversed. Factors which can worsen DR are- Pregnancy, Hypertension, kidney disease, Obesity, Hyperlipidemia, smoking and anemia. Progression of DR can be controlled by controlling the blood glucose levels. Annual retina check is required in Diabetic patients. Certain patients may require Laser treatment or surgery to avoid blindness caused by DR.
Hypertension –
Hypertensive retinopathy (HR)- Uncontrolled hypertension can also be the cause of damaged retinal blood vessels.
Occlusion of the blood vessels in the retina and serious detachment of the retina are also manifestations of HTN.
Premature Newborn –
All infants born at less than 36weeks or weighing less than 1500 g who have received supplemental oxygen should be screened for ROP.
Sickle Cell Anemia –
Sickle Cell Retinopathy- The abnormal shape and rigidity of the red blood cells can cause the blood vessels to get blocked and hence causing damage further on.
Retinal Examination –
Your Ophthalmologist will do a routine vision test and then instill some drops in the eyes to dilate the pupils to be able to visualize your retina appropriately. Fundoscopy test will be done after the dilatation of the pupils.
The vision will be slightly blur after the test till the effect of the drops wear off (approximately 2-3 hours).



