Table I11 summarizes the ophthalmological findings in the present series immediately after operation, i.e. before discharge of the patient. As regards effective visual acuity, 12 patients were improved, 12 unchanged and 7 worse (Table I V ) . The average effective visual acuity before operation was 76 o/o; after operation it was 77 "/o. As far as the visual iield score was concerned, 14 cases were improved, 9 unchanged and 7 worse. The average field score before operation was 47 %; after operation it was 57 …
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