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Biomedical subjects

L Barca

Publications and source records attributed to L Barca.

5 recordsLinked to original sources
PubMed1988

Intraocular pressure changes in secondary positions of gaze in normal subjects and in restrictive ocular motility disorders.

One hundred normal Caucasian eyes and 29 eyes with restrictive disorders of ocular motility were studied in order to delineate intraocular pressure changes in secondary positions of gaze. Applanation tonometry was performed in the primary position and at an angle of 22 degrees. In patients with restrictive syndromes the changes of intraocular pressure in the secondary positions of gaze were significantly higher (p less than 0.0001) than in normal subjects. The range of variation in normal subjects was 0, +3 mmHg for supraduction and -3, +1 mmHg for abduction. Patients with restrictive syndromes showed changes between +1 and +15 mmHg for supraduction and between +3 and +10 mmHg for abduction. Results obtained in the two groups showed the existence of false negatives. This test is thus a practical and useful diagnostic tool, but its results must be evaluated cautiously.

Adolescent↗
PubMed1986

Divergence pseudoparalysis: a case report.

Divergence paralysis is a clinical syndrome that is characterized by esotropia and diplopia at distance fixation and fusion at near fixation. This syndrome is thought to result from a lesion in the brain stem, probably in the midbrain or in the pontine region. This paper reports a case in which ocular motility disturbances, simulating divergence paralysis, were caused by a bilateral and symmetrical restrictive syndrome involving the medial rectus muscles.

Esotropia↗
PubMed1978

Diabetic retinopathy and colour discrimination under various illuminants.

25 patients suffering from diabetic retinopathy, examined with the aid of 100-hue test, show an acquired tritan-like deficiency. Colour discrimination impairment is found to run parallel to visual acuity deterioration. When tested under illumination produced by an Hg source, relatively poor of energy in the short wavelength range, an improvement in colour discrimination (decrease in total score) compared to C illumination is found.

Adult↗