The results of pterygium excision were assessed in an open study following a double-blind study on the effect of after-treatment with Strontium 90 (Sr 90). The results of the treatment of more complicated pterygia with disturbances of ocular motility and reduced visual acuity were also assessed; the treatment consisted of pterygium excision, conjunctival flaps or keratoplasty, and in the case of symblepharon fornix reconstruction. Thirty-three eyes with pterygia which had not previously been operated on, were treated with the "bare sclera" operative technique in combination with Sr 90 irradiation. After this treatment there were no recurrences. In the group of 18 recurrent pterygia which were treated with the same technique, two recurrences were seen. These results of irradiation are in sharp contrast with the 67% chance of recurrence when the "bare sclera" technique is used alone. The results of the more complicated pterygium operations were also successful. Visual acuity, motility and appearance improved markedly or became normal. Recurrences were rare (0-6%).

A study was made of changes in pupil diameter during strabismus surgery performed on 84 children aged from 1 to 12 years. Several factors influencing the appearance of reversible changes in pupil diameter during surgery were examined. The pupil diameters of both eyes were inspected during the course of the operation, and the reactions of manipulated eyes were compared to those of the non-manipulated eyes. Two types of general anesthesia were used, inhalation anesthesia and combined intravenous-inhalation anesthesia, depending upon the patient's body weight. Patient's age and sex, type of anesthesia, surgical procedure and the manipulated eye muscles were documented. The study demonstrated that mydriasis did not occur in patients operated under combined intravenous-inhalation anesthesia, while 74% of those operated solely under inhalation anesthesia developed mydriasis. This mydriasis only occurred during surgical manipulation of the eye muscles. The amount of traction on the other muscles, and the depth of anesthesia were not related to pupil diameter.