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Biomedical subjects

S Masket

Publications and source records attributed to S Masket.

50 records · Page 3Linked to original sources
PubMed1985

Nonkeratometric control of postoperative astigmatism.

A scleral pocket incision technique with continuous suture closure was used in a series of 40 patients undergoing phacoemulsification with posterior chamber lens implantation to determine the change in astigmatic error induced by surgery. Intraoperative keratometry was not used and no attempt to estimate the induced cylinder at the time of surgery was made. Keratometric analysis of postoperative astigmatism in the present study indicated that shortly after surgery there was an induced with-the-rule shift that gradually abated to a minimal against-the-rule change after the wound was fully healed, regardless of how tight the wound was closed at the time of surgery. It appears that intraoperative keratometry would have had no bearing on the final astigmatic outcome.

Astigmatism↗
PubMed1975

Experimental alphachymotrypsin glaucoma.

Experimental glaucoma was produced in 50% of rabbit eyes by injecting 75 units of alphachymotrypsin into the posterior chamber. The elevation of intraocular pressure was stable, rarely exceeded 50 mm Hg, and lasted one year or longer. Progressive buphthalmos first appeared 2 to 3 weeks following injection of the enzyme. Ocular histologic changes included bullous keratopathy, iris and ciliary body atrophy, and cupping of the optic disc. The optic nerve became atrophic but no cavernous degeneration occurred. In the retina there was thinning of the nerve fiber layer and loss of ganglion cells with preservation of the other retinal elements. The mechanism leading to glaucoma following alphachymotrypsin injection is unclear. This study demonstrated formation of peripheral anterior synechiae and reduction of outflow facility within 2 weeks following injection and these factors may play a role.

Animals↗
PubMedDate not supplied

Neodymium:YAG laser optical opening for retained Descemet's membrane after penetrating keratoplasty.

A 78-year-old woman who had intracapsular cataract extraction and anterior chamber intraocular lens implantation 8 years earlier presented with decreased visual acuity (20/400) and discomfort of 2 years duration in the operated eye. Penetrating keratoplasty was done to improve visual function and reduce discomfort; however, at 6 months postoperative, visual acuity was 20/800, due in part to retained opacified host corneal tissue. A retrograft (duplicate) membrane was identified at the posterior aspect of the graft/host junction. The neodymium:YAG laser was used to create a central 3.5 mm circular opening in the duplicate membrane. There were no complications from the laser treatment. The donor cornea remained thin and clear, and visual acuity improved to 20/40 with spectacle correction. It is imperative to confirm complete removal of host corneal tissue before implanting donor tissue; however, vision can be restored, and a corneal graft can remain clear following laser membranotomy.

Aged↗