Laser photocoagulation therapy is widely employed for the treatment of many human–eye retinal dis-eases, yet the technique is not hazard-free and unfavorable results and/or variable success outcomes may pur-sue; depending on laser type, wavelength and method of application. The purpose of the present study was to
evaluate mathematically the laser–induced retinal damage and recovery after laser exposure in chicken eyes.
Thirty-five chickens were divided into 7 equal groups: a control unexposed group, an immediately decapitated
group after exposure, and five decapitated groups on consecutive recovery days 1, 2, 3, 4, and 5; respectively.
Dark adapted chicken eye was exposed to Argon laser (488 nm, 1 mW/cm2
; 0.12 sec duration) and the electri-cal conductivity was measured for chicken retina at temperatures 10, 20 and 30 °C. The retinal thermal damage
induced by the ionic activation energy Ωw(t) and by the relaxation activation energy Ωr(t) was evaluated using
an Arrhenius formula for all study groups. Results showed that, after thermal retinal damage by laser exposure
in the first two days, recovery was attained in the next four days. |
