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First Author: P.Sperl AUSTRIA
Co Author(s): H. Kraker C. Strohmaier K. Krefft G. Grabner H. Reitsamer
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To measure intraocular pressure in enucleated eyeballs during femto-second cataract surgery with the Catalys® femto-second-laser system (Optimedica® CA, USA).
Dept.of Ophthalmology & Optometry, Paracelsus University, Salzburg, Austria.
Intraocular pressure was measured in post mortem enucleated eyeballs (n=6) not suitable for keratoplasty by direct cannulation of the vitreous body. A second cannula was inserted to adjust intraocular pressure to a baseline pressure of 20 mmHg. The eyeballs were lifted by custom-made stands to achieve an appropriate height and positioned under the Catalys® system. After the patient interface was connected to the eyeball, the eye was placed underneath the laser lens and docked to the system in the typical manner. Afterwards all steps of the femto-second-laser treatment were performed, including capsulotomy, lens fragmentation, arcuate incisions and main- as well as sideports. These steps were customized to the anatomical conditions of the enucleated eyeball.
IOP was measured continuously during the treatment. Baseline IOP was 23,91ḟ0,2744 mmHg. IOP raised up to 49,90ḟ1,0094 mmHg after the patient interface was connected to the eyeball. The peak IOP of 61,56ḟ3,4692 mmHg occurred while the patient interface connected to the eyeball was being docked onto the laser lens. After the final docking step, the system reduced the force applied to the patient interface and IOP decreased subsequently to 34,88ḟ11,2112 mmHg during laser treatment. All data are measurements of intraocular pressure given as mean ±95% CI (mmHg).
A significant raise of IOP was observed during femto-second-laser treatment in the enucleated eyes used.