Keith M Robertson

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The variations in fixation disparity (FD) with spatial frequency and retinal locus of fusion locks were examined in two groups of subjects having either steep or flat forced-duction FD curves. FD for subjects with flat curves was unaffected by either spatial frequency or diameter of fusion locks. FD of observers with steep forced-duction curves increased(More)
Our lift lip technique consists of an excision of the white part of the upper lip directly beneath the nose in the shape of a 'bull's-horn', with advancement of the inferior border of the incision to the area directly beneath the nose. Pre-operative markings on the skin ensure the lip lift is approximately symmetric. Advancement of the inferior edge of skin(More)
A comprehensive rejuvenation of the neck depends on accurate analysis of the lower face and neck with attention to the contours and deep-lying structures. Although many surgeons address the well-recognized changes in skin and soft tissue that occur with aging, we believe bone resorption is also an important component. Loss of bone volume leads to loss of(More)
The initial velocity of the vergence response to step changes in disparity was examined in two subjects as a function of the retinal locus and spatial frequency of fusion stimuli. Vergence velocity decreased for both subjects as retinal eccentricity increased and it was unaffected by spatial frequency. The same subjects had very different amounts of(More)
Cyclosporine is an important immunosuppressive agent often given orally preoperatively to patients undergoing organ transplantation. The aim of the present study was to evaluate the effects of anesthesia on the pharmacokinetics of orally administered cyclosporine. Sixty unanesthetized fasting female Lewis rats were given 25 mg/kg cyclosporine by gastric(More)
An increasing number of anaesthetists is being called upon to manage organ donors during organ retrieval procedures. We briefly describe the technical aspects of the surgical procedure together with a guide to the anaesthetic management. The aims of the latter may be summarized as the "Rule of 100": systolic blood pressure greater than 100 mmHg, urine(More)
Endoscopic brow lifting has largely replaced coronal brow lifting (Fig. 12). The results are at least equivalent, if not better, with a greatly decreased incidence of scarring, alopecia, and numbness of the scalp. The technique has a steep learning curve. The equipment needed to perform the surgery is expensive,but the authors believe that a well-trained(More)
Visual training has an effect on the vertical vergence amplitudes. Three mature symptomatic patients exhibited a significant increase in the vertical vergence which compensates for the vertical heterophoria. Subjects with normal binocularity and hence no vertical heterophoria did not exhibit increased vertical vergence amplitudes after training.
Steady-state and transient Visually Evoked Responses (VERs) were used to verify a paradoxical aniseikonic condition in an anisometropic patient. Testing on the Remole multimeridional horopter apparatus indicated that a 2% overall magnification was required for the more hyperopic eye to eliminate ocular image size differences. A special lens correction for(More)