Evaluation of a KTP (potassium-titanyl-phosphate) 532 nm laser for endovaporization of choroidal melanomas.

Background And Objectives: The purpose of this in vitro study is to evaluate the use of the KTP (potassium-titanyl-phosphate) 532 nm laser for future use in endovaporization of large choroidal melanomas.

Study Design/materials And Methods: A KTP 532 nm green laser coupled to a 0.3 mm fiberoptic probe was used to perform in vitro studies on human cadaver eyes and on one enucleated melanoma eye.

A conservative blepharoplasty may be a means of alleviating dry eye symptoms.

Purpose: Patients with dermatochalasis often complain of dry eye symptoms. In a prospective study, the influence of upper eyelid blepharoplasty on dry eye symptoms, tear film parameters and ocular surface morphology was evaluated.

Methods: Patients with upper eyelid dermatochalasis were studied before and 3 months after upper eyelid blepharoplasty.

Endolacrimal KTP laser-assisted dacryocystorhinostomy.

Objective: To describe our experience with potassium-titanyl-phosphate (KTP) laser-assisted dacryocystorhinostomy, controlled via endolacrimal and endonasal endoscopy. The development of miniendoscopes enables endoscopy of the lacrimal drainage system via the lacrimal puncta to visualize the exact site of a stenosis.

Design: A case series of 78 patients, with 1-year postoperative follow-up.

Endolacrimal laser assisted lacrimal surgery.

Aims: To utilise the improved optical qualities of newly developed lacrimal endoscopes and newly miniaturised laser fibres for diagnostic visualisation and laser surgery of the lacrimal system.

Methods: A KTP laser (wavelength 532 nm, 10 W energy) was used for laser assisted dacryocystorhinostomy (DCR) with endolacrimal visualisation in 26 patients. Bicanalicular silicone intubation was placed in all patients for at least 3 months.

The role of UV-radiation in the development of conjunctival malignant melanoma.

Purpose: To investigate the possible role of UV-radiation in the development of conjunctival malignant melanoma. N-ras mutations are frequently found in cutaneous melanomas of sun-exposed body areas. UV-radiation is thought to induce mutations in the N-ras gene, that convert these genes into active oncogenes.