Biomedical subjects

J M Twomey

Publications and source records attributed to J M Twomey.

4 recordsLinked to original sources

PubMed1990

Ocular enlargement following infantile corneal opacification.

Congenital hereditary endothelial dystrophy (CHED) is not generally thought to be associated with other ocular abnormalities. Ultrasonography in a series of twenty eyes (ten patients) with CHED shows ocular enlargement similar to that occurring in uncomplicated axial myopia. There was an inverse relationship between the degree of enlargement and the visual acuity or visual result following penetrating keratoplasty suggesting that infantile corneal oedema sufficient to cause stimulus deprivation may result in abnormal enlargement of the globe.

Adolescent↗

PubMed1989

Endocapsular cataract extraction.

Endocapsular (intercapsular) cataract surgery has recently gained popularity, particularly in Europe. We describe our technique of endocapsular cataract extraction and insertion of an intraocular lens and prospectively compare 93 eyes which underwent endocapsular cataract extraction with 83 which underwent a standard extracapsular procedure. There was no apparent difference between the two groups in visual outcome. Preoperative and post-operative complications were more common in the endocapsular group: posterior synechiae formation in the latter occurred in 19%. In 90% of the endocapsular cataract extractions, the lens was placed 'in the bag' at the time of surgery but at three months only 53% remained 'in the bag'. Displacement of one haptic from the capsular bag was associated with symptomatic lens decentration requiring repositioning in four eyes in the endocapsular group and two eyes in the extracapsular group.

Adult↗

PubMed1988

Behaviour of intraocular gases.

The changes in volume of intraocular bubbles of air, sulphur hexafluoride, perfluoropropane and mixtures of these gases, were studied in human eyes, following vitrectomy for treatment of retinal detachment. The implications of these findings, for the provision of optimal internal tamponade in the treatment of retinal detachment, are discussed.

Air↗

PubMed1988

Retinal compression folds.

Twelve cases of retinal compression folds occurring after successful retinal re-attachment surgery are reported. In all 12 eyes surgery included the use of a circumferential buckle, internal tamponade with gas or silicone oil and drainage of sub-retinal fluid. The mechanism of retinal fold formation is discussed.

Female↗