True about acid injury to eye are all except?
makes a barrier and prevent deeper penetration
more destructive than alkali injuries
steroids are used to control inflammation
glaucoma is most preventable complication following acid injury
Chemical injuries of the eye may be divided into 2 types 1. Acid injuries (Burns)- less destructive--> coagulate and precipitate proteins--> create a barrier and prevent fuher penetration (Except- Hydrofluoric acid--> fluoride ions penetrate into deep tissues --> more damage) Ground glass apparance 2. Alkali injuries- severe, they are lipophilic--> saponification of memebrane lipids--> tissues undergo liquefactive necrosis + release of proteolytic enzymes--> damage Mx - Immediate Irrigation with normal saline (even water if normal saline not available) for minimum 30 mins, pH of conjunctiva must be 7-7.2. Chemical debris can be removed by double eversion Rx- Topical antibiotics (Grade I-III injuries- erythromycin /Grade IV- moxi/gatifloxacin) Cycloplegics (atropine/homatropine) Topical steroids (prednisolone acteate - 10days, tapered by 14 days based on clinical response) Doxycyline (-) MMP Antiglaucoma drugs to avoid secondary glaucoma Vitamin C Tear supplements Other Mx options - Autologous serum, Amniotic membrane transplantation (AMT), mucous membrane graft, Conjunctival flaps
Trauma