Fluência do laser e tempo de parada cirúrgica, por perda de fixação, como fatores relacionados à precisão refracional

Abstract

Objective: To evaluate the correlation of flow and stopping time intraoperative loss of attachment factors as hypertension or hipocorreções of refractive errors after Lasik. Methods:The age ranged between 19 and 61 years (mean= 31.27 ± 9.99 (mean= 0.23 ± 0.69) and postoperative uncorrected 0.40-0 (x= 0.30 ± 0, 68). (mean= 0.545 ± 0.01), p = 0.762) between the flow and spherical equivalent (mean = -0.04 ± 0.38) in eyes operated. The minimal downtime during surgery was 02 seconds and maximum was 12 seconds (mean= 4.90 ± 3.47). Making a correlation (r = 0.08865, p = 0.411) p=0,424). No equivalente esférico pré e pós-operatório, notou-se uma óbvia diferença (p< 0,0001), no pré-operatório com média de -4,09 ± 2,83 e o pós com média de -0,04 ± 0,38. A mediana foi de -4,75 no pré e de 0 no pós-operatório. Sessenta e nove casos (78,3%) ficaram plano ± 0,25. A fluência mínima foi de 0,513 mJ/cm 2 e a máxima de 0,581 mJ/cm 2 com média de 0,545 ± 0,01, não se percebendo correlação (r= -0,03266; IC 95% -0,241 a 0,178; p= 0,762) entre a fluência e o equivalente esférico final (média= -0,04 ± 0,38) nos olhos operados. O tempo mínimo de parada transoperatória foi de dois segundos e o máximo de 12 segundos com média de 4,90 ± 3,47. Fazendo-se uma correlação (r= 0,08865; IC 95%= -0,123 a 0,293; p= 0,411) entre o equivalente esférico pós-operatório e o tempo de parada transoperatória, não se percebeu diferenças. Conclusão: Não houve correlação entre a fluência do laser e o tempo de parada transoperatória por perda de fixação, com hiper ou hipocorreções nas ametropias pós-Lasik. The Median= 0 logMAR for both time points (p= 0.424). For spherical equivalent before and after surgery, we found an obvious difference, with the pre (mean= -4.09 ± 2.83) and post (mean= -0.04 ± 0.38). The Median was -4.75 in the pre and zero postoperatively (p <0.0001). Sixty-nine cases (78.3%) were plan ± 0.25. Fluency minimum= 0.513 mJ/cm2 and maximum= 0.581 mJ/cm2Descritores (1) . Pallikaris was the first to promote the removal of corneal stromal tissue with excimer laser to correct refractive errors (2) . The use of excimer laser to correct myopia, hyperopia and astigmatism evolved in recent years, mainly due to the technological advancement of devices.Laser-assisted in situ keratomileusis (LASIK) is still the most widely used technique; it is a painless, safe, and accurate method for treating refractive errors with quick recovery (3)(4)(5) . By preserving epithelial integrity in the central region of the cornea, it promotes a milder wound healing reaction. The healing response triggered by the laser and the creation of a flap are important to the safety and efficacy of the procedure. However, it is a significantly complex event (6) . The literature reports great refractive stability from the 3 rd month after surgery (7)(8)(9) . However, do intraoperative factors such as daily variations in laser fluence and interruptions during laser application due to loss of fixation influence the refractive outcome?The aim of this study was to ev...

Floristic Survey of Myrtaceae in Seasonal Semidedecidual Forest in the Maringá Region

“…The bottlebrush or crimson brush is an ornamental shrub native to Australia [15]. It is used in some countries in forestry, essential oil production in weed control, in addition to showing potential use in antibacterial activities.…”

“…Don. : The Red Callistemon, also called Bottlebrush by some authors, is an ornamental tree originally from Australia [15], which together with Callistemon citrinus has a slight potential of antimicrobial action [25]. Like the species Callistemon salignus, it also only has a geographic distribution in Southeast Brazil.…”