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Biomedical subjects

P Sourdille

Publications and source records attributed to P Sourdille.

At least 19 recordsLinked to original sources
PubMed1992

[Eye controlled microscope used in ophthalmic microsurgery].

This article presents a system of oculomotor control of the microscope used in ophthalmic microsurgery. An eye movement sensor has been integrated within the microscope lens. The information provided by this sensor is used to control the position of the microscope with no alteration of the surgeon's visual functions and no interference with his visual sensori-motor reflexes. Results have been obtained from laboratory experimentations as well as from a series of anterior and posterior segment surgical procedures. They demonstrate the high precision and sensitivity of the gaze control which can be used to compensate for the reduction of the field of vision resulting from the optical magnification of the microscope.

Eye Movements↗
PubMed1984

[Fate of artificial lenses: a scanning electron microscopy study].

Thirty one intraocular lenses removed from human eyes 2 months to 30 years after implantation were examined by scanning electron microscopy. Binkhorst 4 loop lenses (12) and 2 loop lenses (6), and Choyce lenses (6) were the most prevalent styles examined. Most of the lenses produced before 1978 were found to have manufacturing defects (mold disalignment, unfinished gate areas, etc.). More recent lenses showed an improvement in the quality of the surface. The lenticular, nonimpinging portion of the lenses made with polymethylmethacrylate did not demonstrate signs of degradation. However the holes in the edges of the lenses were rough and poorly finished with obvious irregularities. On the other hand, the lens foot of a Choyce lens revealed severe unusual abnormalities: the plastic surface changes may be consistent with degradation. Examination of explanted iris clip lenses showed degradation of the polypropylene loops in two cases: the loops were found to have fractured surfaces.

Corneal Diseases↗
PubMed1980

[Penetrating keratoplasties (author's transl)].

The authors relate the specular microscopy study of 19 penetrating keratoplasties. Seven of them were associated with an intra-ocular lens. The mean cell density is 1 100 cells/SQ. MM. The endothelial cell density does not differ in the two series. One graft remains clear with 330 cells/SQ. MM.

Adult↗