Studies on canine cataract surgery and optical rehabilitation by IOL implantation
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Date
2008-01
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present study was conducted on twelve canine cataract patients of 4-12 years age to evolve a suitable anaesthetic regimen, comparative evaluation of Extracapsular Cataract Extraction versus Phacoemulsification and correction of refraction in postoperative dogs. Animals were screened for cataract surgery on the basis of clinical, ophthalmic, neuro-ophthalmic examinations and B-scan ultrsonography. Selected animals were divided into three equal groups A, B and C and subjected to Extracapsular Cataract Extraction, Extracapsular Cataract Extraction with Rigid Intraocular Lens implantation and Phacoemulsification with Foldable Intraocular Lens implantation respectively. A-scan ultrasonography and Keratometry were performed to calculate diopteric strength of intraocular implant. Pancuronium bromide @ 0.01mg/kg body wt, I/V in thiopentone anaesthetized dogs produced centrally fixed eye in surgery. Ingroup C, less post operative complications were observed than group A and B. Streak retinoscopy revealed less refractive error in comparison to predicted value.Aqueos humour analysis ruled out increased protein conc. in post operated dogs. Vision restoration was better in group C followed by group B and A respectively. The studies indicate successful use of pancuronium bromide @ 0.01mg / kg b.wt as muscle relaxant, requirement of less IOL power than the predicted value and phacoemusification with foldable IOL proved better technique.
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