Sohair Mohammed Gassim2023-01-112023-01-112009-03http://hdl.handle.net/123456789/18613Thesis Submitted as Partial Fulfillment of the Requirements of M.Sc. Degree in Optometry and Visual SciencesAbstract The aim of this study is to maintain binocular single vision in patients with intraocular lenses . ‘ Fifty patients were selected from Alwalidin eye hospital .in (May 2007 — March 2009 ) . All of the patients had a unilateral recent mature cataract .the operation had already done ,the selection of the patient done from records . The main cause was trauma . The other eye had refractive error more than Z.00D . Both eyes had no ocular abnormalities. The study intended to provide good assessment for each patient with refractive error in the unoperated eye before intraocular lens implantation . lnfomiation gathered included age ,gender. refraetionocular complaint. Fundscopy .keratometry .intraocular lens calculation and A-B scan . Partial retrospective study Statistical analysis of data was done by using SPSS program . The study revealed 36(72%) were males and l4 (28%) were Females .with a ratio of 3:1 respectively .The age ranged between 21 to 47 years .The calculations for IOL to maintain normal refractive state were performed before doing the surgery . Three months after surgery. 70% of patients presented with diplopia and 30% had other symptomstincluding headache . discomfort . nausia and vomiting . The refractive state showed a normal to small refractive error, less than lD spherical or astigmatic error in the psudophakic eye. while the other eye had a refractive error between 2 to 10 D .AnisometropiaLens ImplantationThesis