[An experimental model to measure real intraocular pressure (IOP) during LASIK]. / Modelo experimental para medir la presión intraocular (PIO) durante LASIK.

PURPOSE: To design a model to measure real IOP during lasik in pig eyes. METHODS: A reusable blood pressure transducer was used. Each eye was placed on a stand with sufficient support for the surgical procedure. The globes were inflated with 5% glucosated solution through the optic nerve to attain an IOP of 10-20 mmHg. A 27-gauge catheter was then inserted from the pars plana to the anterior chamber cavity. Real IOP was transmitted via the catheter liquid column to an external sensor. A suction ring was applied and a flap was created. During the procedure, IOP was registered with the ML110 Bridge Amplifier connected to a baro transducer. RESULTS: Values of real IOP were measured in freshly enucleated pig eyes during the lasik procedure. The model was able to instantaneously register the changes in IOP induced by the application of a suction ring and the creation of a flap in the pig eyes with good reproducibility. At the end of the procedure the IOP values remained stable. CONCLUSIONS: We have developed an experimental model to observe the course of suctioning and changes in IOP simultaneously. This model seems to be accurate in obtaining IOP values from the anterior chamber cavity during LASIK.

[Eclipse retinopathy: three case reports]. / Retinopatía por eclipse. A propósito de tres casos.

CASE REPORT: We present the evolution of eclipse retinopathy in 3 patients who came to our hospital after the eclipse of October 2005 and had foveal lesions and visual field alterations. DISCUSSION: Eclipse retinopathy is a maculopathy that occurs after exposure to intense solar radiation, such as occurs during an eclipse, and is produced by a photochemical mechanism. Although the macular changes and symptoms are usually reversible, residual defects at the level of the EPR and scotoma in visual fields can occur. For these reasons the most appropriate treatment is prevention by means of public awareness campaigns.

Modelo experimental para medir la presión intraocular (PIO) durante LASIK / An experimental model to measure real intraocular pressure (IOP) during LASIK

Objetivo: Diseñar un modelo para medir la presión intraocular real (PIO) durante el procedimiento LASIK (Laser Assisted in situ Keratomileusis) en ojos de cerdo. Métodos: En este experimento se utilizó un transductor de presión sanguínea. Cada ojo se colocó sobre una superficie con soporte como para realizar el procedimiento quirúrgico. Los ojos se insuflaron con una solución glucosada al 5% introducida a través del nervio óptico con el fin de conseguir una presión intraocular de inicio de entre 8-20 mmHg. En ese momento, un catéter de 27G se insertó desde la pars-plana hacia la cámara anterior. La PIO real se transmitió vía la columna líquida del catéter hacia un sensor externo. Después se colocó el anillo de succión y se realizó el corte. Durante todo el proceso, la PIO fue registrada mediante un amplificador ML 110 Bridge conectado al baro-transductor. Resultados: Se midieron los valores de PIO real, en siete ojos de cerdo enucleados, durante el procedimiento LASIK. El modelo fue capaz de registrar instantáneamente los cambios de PIO inducidos por la aplicación del anillo de succión y la creación del flap corneal con buena reproductibilidad. Al final del procedimiento, los valores de PIO resultantes permanecían estables. Conclusiones: Hemos desarrollado un modelo experimental para observar simultáneamente durante la succión del ojo y la creación del flap los cambios de presión intraocular que se producen. Este modelo parece ofrecer con precisión los valores de PIO en la cámara anterior durante el procedimiento LASIK

Purpose: To design a model to measure real IOP during lasik in pig eyes. Methods: A reusable blood pressure transducer was used. Each eye was placed on a stand with sufficient support for the surgical procedure. The globes were inflated with 5% glucosated solution through the optic nerve to attain an IOP of 10-20 mmHg. A 27-gauge catheter was then inserted from the pars plana to the anterior chamber cavity. Real IOP was transmitted via the catheter liquid column to an external sensor. A suction ring was applied and a flap was created. During the procedure, IOP was registered with the ML110 Bridge Amplifier connected to a baro transducer. Results: Values of real IOP were measured in freshly enucleated pig eyes during the lasik procedure. The model was able to instantaneously register the changes in IOP induced by the application of a suction ring and the creation of a flap in the pig eyes with good reproducibility. At the end of the procedure the IOP values remained stable. Conclusions: We have developed an experimental model to observe the course of suctioning and changes in IOP simultaneously. This model seems to be accurate in obtaining IOP values from the anterior chamber cavity during lasik