This document summarizes various types of radiation injuries that can occur to the eye, including from ultraviolet, infrared, and ionizing radiation. It describes the biological effects of ionizing radiation and the signs and symptoms that can result from different radiation exposures, such as conjunctivitis, keratitis, cataracts, retinopathy, and papillopathy. Treatment options include cycloplegics, antibiotics, and cataract extraction in severe cases. Radiation injuries can cause transient or permanent damage depending on the radiation type and exposure level.

1. RADIATION INJURIES TO EYE Dr. Ankit Punjabi P.G., Dept of Ophthalmology, K.I.M.S. Hospital, Bangalore Email: drankitalways@gmail.com

2. INTRODUCTION ULTRAVIOLET RADIATION - welding arc, sun lamps, & carbon arc. INFRARED BURNS - furnaces IONIZING RADIATION - cyclotron exposure, B- irradiation

3. MANIFESTATION OF ELECTROMAGNETIC TRAUMA ON THE POSTERIOR SEGMENT

4. INTRODUCTION BIOLOGICAL EFFECT OF IONIZING RAD. Produces ds break in DNA to kill a cell Interact c- water to generate free radical eg. Hydroxyl ion Free radicals are unstable compound Biological effect expressed when damaged cell attempt to divide

5. UV RADIATION Most common cause of light induced injury Symptoms appear 6-10 hrs after exposure Symptoms- Irritation FB sensation Photophobia Pain Spasm of the lids

6. UV RADIATION Examination lid edema Conjuntival hyperemia Punctate roughening of corneal epithelium Rarely damage lens Radiation does not reach the retina

7. UV RADIATION TREATMENT Cycloplegic P & B for 12-24 hrs Analgesic PROGNOSIS- damage is transient all recovered c-in 24-48 hrs

8. INFRARED BURNS Acute exposure produces temporary lid edema & erythema No damage to globe Chronic exposure seen in glass blower & metal furnace stocker Develop cataract No other anterior & posterior segment changes are found

9. IONIZING RADIATION SIGN & SYMPTOMS Erythema of skin Conjuntival hyperemia Circumcorneal injection Watery/ mucopurulent discharge Stromal edema, interstitial keratitis, aseptic corneal necrosis Cataract- (500-700 rad), younger more vulnerable

10. IONIZING RADIATION SIGN & SYMPTOMS For cataract latency period- 6M – 12 years Uveal tract – vascular dilatation & boggy edema Intraretinal Hg. Retinopathy Papilledema CRV thrombosis

11. RADIATION RETINOPATHY Fundus photograph & FFA Cotton-wool spot Retinal Hg Micro-aneurysm telangiectasia

12. RADIATION RETINOPATHY

13. REDIATION RETINOPATHY C- SEVERE MACULOPATHY

14. RADIATION PAPILLOPATHY

15. IONIZING RADIATION TREATMENT Cycloplegic Topical antibiotic BCL Cataract extraction