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By ULY CLINIC

 

Diabetic Retinopathy

Introduction

Diabetic Retinopathy is a complication of diabetes mellitus in the eyes.

 

It is a chronic progressive sight-threatening disease of the retinal blood vessels associated with the prolonged hyperglycaemia and other conditions linked to diabetic mellitus such as hypertension 

 

Diagnostic Criteria

Diabetic retinopathy is mainly grouped into three stages/presentations: 

  • Background diabetic retinopathy

  • Diabetic maculopathy 

  • Proliferative diabetic retinopathy 

Investigations

  • Perform fundoscopy in a well-dilated pupil (Direct or indirect ophthalmoscopy with or without biomicroscopy), 

  • Fundus photography, 

  • Optical Coherence Tomography and or Fluorescein Angiography done in specialized eye clinics 

 

Note : Dilate the pupils with combined C: Tropicamide 1%/Phenylephrine 2.5% eye drops 

OR  

  • Tropicamide 1% with  C: Cyclopentolate 1% eye drops to screen 

 

Pharmacological Treatment

 

For glycaemic control give antioxidant in non-proliferative diabetic retinopathy  

  • Multivitamin +carotenoids tablets once daily to a maximum of 3 months

 

For intravitreal anti Vascular Endothelial Growth Factor (VEGF) in Proliferative Disease

 

  • Bevacizumab 1.25 mg per 0.05ml stat

 OR

  • Ranibizumab 0.5 mg per 0.05ml stat.  

 

Repeat after every month to a maximum of 6 months. Re-assess on 3 monthly basis if there are signs of disease progression, restart treatment if any, with close follow up. 

Note: These injections are only given by specialist eye surgeons.  

AND 

  • Injection Triamcenolone acetonide 0.05 ml intravitreal stat. Repeat after 3 months if it is necessary. This is indicated in Diabetic Macula Edema.  

Surgical Treatment

  • This is done in the proliferative stage

  • It involves removal of vitreous and or blood, peeling of formed fibrovascular tissue and reattachment of retina if the retina is detached

  • It is combined with retinal photocoagulation

  • The vitreous cavity may be filled with temponade liquid such as silicon oil or expansile gas like sulfur perfluoropropane or hexafluoride depending on the level of complication

  • It may also be combined with pharmacological treatment (Anti VEGF) mentioned above 

Laser Treatment

Laser photocoagulation: Extent and type of this treatment depending on the stage of the disease 

Note: 

  • Ophthalmologists should work together with Physicians to holistically treat the diabetic patient. 

  • Poorly controlled diabetes and diabetic retinopathy can lead to blindness

  • All patients with diabetes mellitus regardless of their eye conditions, should have a thorough eye examination by available eye care personnel or an eye specialist at least once a year.

  • Dilated eye examination and direct viewing of the retina by an ophthalmologist or qualified eye care personnel is mandatory.

  • Urgent referral of all diabetic patients with sudden loss of vision to eye specialist 

Updated on, 2.11.2020

References

1. STG 

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