[Two different intra-corneal inlay surgical technique in rabbit eyes]. / Comparación de dos técnicas de implantación de lentes intracorneales en ojos de conejo.

OBJECTIVE: To compare two different surgical techniques of intracorneal lens implantation. To determine the incidence of corneal and lens complications in two groups of rabbits subjected to such surgery. METHOD: The first group (7 rabbits) initially had a keratectomy performed with the microkeratome following which the corneal flap was sutured to the stromal layer. In the second group (7 rabbits), a pocket-shaped stromal dissection was performed manually. Both groups of rabbits had a secondary lens implantation in the corneal inlay. The follow up period was of 2 months duration. RESULTS: The incidence of corneal edema in the first month was higher in group 1 (71.4%) than in group 2 (14.3%) (p = 0.0155); during the second month, the incidence was 42.9% in group 1 and 28.6% in group 2 (p= 0.2927). Flap dislocation and retraction of the flap was seen in 4 of the 7 rabbits in group 1, whereas no complication of this type was observed in the manual pocket group (group 2). The incidence of lens subluxation was 28.6% in group 1 and 0% in group 2. Finally, there was a 71.4% (5/7) loss of the intracorneal lens in the rabbits treated with the microkeratome (group 1) while only 1 of 7 rabbits (14.3%) lost the lens in group 2 (P = 0.0155). DISCUSSION: Eyes in which the corneal pocket shape was made by manual stromal dissection had a higher stability of the lens and less post-operative corneal complications.

Comparación de dos técnicas de implantación de lentes intracorneales en ojos de conejo / Two different intra-corneal inlay surgical technique in rabbit eyes

Objetivos: Comparación de dos técnicas quirúrgicas para la implantación de lentes intracorneales. Incidencia de complicaciones corneales y lenticulares en 2 grupos de conejos intervenidos con las técnicas descritas.Método: Estudio experimental en 2 grupos de conejos. Grupo 1 (siete conejos): se practica una queratectomía con microqueratomo, se implanta la lente y se sutura la córnea con dos puntos. Grupo 2 (siete conejos): se talla un bolsillo estromal según técnica manual, se implanta la lente y se sutura la zona de la incisión con 2 puntos. En ambos grupos se realizó un seguimiento por 2 meses.Resultados: La incidencia de edemas corneales en el primer mes fue superior (71,43%) en el grupo 1 y menor en el 2 (14,28%) (p: 0,0155), así como en el segundo mes (42,86% vs 28,57%) (p: 0,2927). Se observaron adhesiones incompletas y retracciones de la queratectomía (4/7) en el grupo 1, complicaciones no observadas en el grupo 2. La incidencia de descentramientos de la lente fue del 28,57% en el grupo 1 y del 0% en el grupo 2. La pérdida de lente intracorneal se produjo en cinco de los siete casos (71,43%) del grupo 1 y en solo 1 de 7 (14,28%) del grupo 2 (P: 0,0155).Conclusiones: Los ojos intervenidos por medio de la técnica manual denominada de bolsillo, fueron los que presentaron más seguridad en cuanto a estabilidad de la lente intracorneal (descentramientos y pérdida de lentículo) y menor incidencia de complicaciones postoperatorias corneales

Objective: To compare two different surgical techniques of intracorneal lens implantation. To determine the incidence of corneal and lens complications in two groups of rabbits subjected to such surgery. Method: The first group (7 rabbits) initially had a keratectomy performed with the microkeratome following which the corneal flap was sutured to the stromal layer. In the second group (7 rabbits), a pocket-shaped stromal dissection was performed manually. Both groups of rabbits had a secondary lens implantation in the corneal inlay. The follow up period was of 2 months duration. Results: The incidence of corneal edema in the first month was higher in group 1 (71.4%) than in group 2 (14.3%) (p= 0.0155); during the second month, the incidence was 42.9% in group 1 and 28.6% in group 2 (p= 0.2927). Flap dislocation and retraction of the flap was seen in 4 of the 7 rabbits in group 1, whereas no complication of this type was observed in the manual pocket group (group 2). The incidence of lens subluxation was 28.6% in group 1 and 0% in group 2. Finally, there was a 71.4% (5/7) loss of the intracorneal lens in the rabbits treated with the microkeratome (group 1) while only 1 of 7 rabbits (14.3%) lost the lens in group 2 (P= 0.0155). Discussion: Eyes in which the corneal pocket shape was made by manual stromal dissection had a higher stability of the lens and less post-operative corneal complications