Comparison of the balafilcon A and samfilcon A lenses on postoperative pain control and epithelial healing time after ph
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ORIGINAL ARTICLE
Comparison of the balafilcon A and samfilcon A lenses on postoperative pain control and epithelial healing time after photorefractive keratectomy: a contralateral eye study Necati Duru 1
&
Orhan Altunel 1 & Ender Sırakaya 1 & Bekir Küçük 1
Received: 26 November 2019 / Accepted: 14 February 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract To compare the effects of balafilcon A and samfilcon A silicone hydrogel bandage contact lenses on postoperative pain control and epithelial healing time after photorefractive keratectomy (PRK). Seventy-four eyes of 37 patients who underwent bilateral PRK were included in this randomized clinical trial study. In the end of the surgery, a balafilcon A lens was used in one eye and a samfilcon A lens was used in the fellow eye randomly. Pain, blurred vision, epiphora, photophobia, and foreign body sensation were assessed on the first and third postoperative day using a visual analogue scale (0 = no ocular pain or discomfort, 10 = highest level of ocular pain and discomfort). For balafilcon A and samfilcon A lenses, mean scores for pain were 6.22 ± 2.81 and 3.11 ± 2.90 on first postoperative day (p < 0.001) and 1.57 ± 1.65 and 0.68 ± 0.85 on third postoperative day (p = 0.001), respectively; mean scores for foreign body sensation were 6.11 ± 2.53 and 3.19 ± 2.72 on first postoperative day (p < 0.001) and 3.16 ± 1.92 and 1.35 ± 1.43 on third postoperative day (p < 0.001), also respectively; and mean scores for epiphora were 6.46 ± 2.64 and 5.46 ± 3.40 on first postoperative day (p = 0.007) and 1.68 ± 1.60 and 1.32 ± 1.31 on third postoperative day (p = 0.065), again respectively. No significant difference in blurred vision or photophobia emerged between the lenses on first and third postoperative day after PRK. On the third postoperative day, reepithelialization was complete in 83.7% of eyes with the balafilcon A lens and 89.1% of eyes fitted with the samfilcon A lens. Wearing samfilcon A lenses after photorefractive keratectomy can significantly manage pain, decrease foreign body sensation on first and third postoperative day, and reduce epiphora on first postoperative day. Keywords Balafilcon A . Samfilcon A . Pain . Photorefractive keratectomy
Introduction Photorefractive keratectomy (PRK) is one of the major refractive surgical techniques which were approved by the FDA in 1995. Photorefractive keratectomy (PRK) is one of the major refractive surgical techniques which were approved by the FDA in 1995. Excimer lasers employed in refractive corneal surgery use rare gas and halogen gas molecules. A cavity in excimer laser system is filled with a gaseous mixture of argon and fluorine. A high-voltage electric discharge is sent across the cavity. Electrons of the argon–fluoride atoms move to a
* Necati Duru [email protected] 1
Department of Ophthalmology, Kayseri City Education and Research Hospital, Kayseri, Turkey
higher energy level by the effect of strong electrical discharges, which causes an unstable bond to be formed between thes
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