Biomedical subjects

T A Meredith

Publications and source records attributed to T A Meredith.

74 records · Page 5Linked to original sources

PubMedDate not supplied

Pars plana lensectomy by ultrasonic fragmentation. II. A poor procedure for routine cataract extraction.

Removal of the lens through a pars plana incision may be carried out with an aspiration-cutting device in young soft lenses, and with ultrasonic fragmentation, combined with an aspiration-cutting probe, in older, harder lenses. Extremely hard lenses cannot be efficiently removed through small incisions. These techniques are most useful when combined with a pars plana vitrectomy so that the same sized incision may be used for both procedures. In a few other selected situations, lensectomy through a pars plana incision is also advantageous. Adoption of this incision site for routine senile cataracts in unwarranted because: 1) small gauge instruments have little ability to remove very hard lenses; 2) vitreous must be incised in all cases, opening the door to unnecessary complications; and 3) loss of lens fragments into the posterior segment in 30-40% of eyes produces an unacceptably complex surgical procedure compared to limbal extraction.

Cataract Extraction↗

PubMedDate not supplied

"Luggage-tag" suture fixation of partially dislocated intraocular lenses.

There are many techniques for sulcus-suturing dislocated or partially dislocated intraocular lenses. Many involve passing suture or a knot around the end of the haptic before securing the suture to the sclera. However, in some patients, the tip of the dislocated haptic cannot be visualized. We describe a suturing method using vitrectomy techniques that was used in two patients when the end of the haptic could not be visualized. The technique involves passing an untied loop of double-armed suture under the haptic so that it emerges upward between the haptic and the optic. The loop of suture is regrasped from above the haptic and externalized. The free ends are passed through the loop in a manner analogous to a luggage tag, and the knot is secured. This technique may be useful in patients where the tip of the haptic cannot be visualized, or in patients requiring minimal manipulation of the intraocular lens.

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