Does the number of laser applications for ROP treatment influence the degree of myopia?
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RETINAL DISORDERS
Does the number of laser applications for ROP treatment influence the degree of myopia? Tatsuya Inoue 1,2 & Ryo Asaoka 1,3,4 & Yohei Hashimoto 1 & Kohdai Kitamoto 1 & Marie Kitano 1 & Asahi Fujita 1 & Keiko Azuma 1 & Kazuhiro Yamamoto 1 & Miyuki Nagahara 1 & Kazuaki Kadonosono 2 & Ryo Obata 1 Received: 8 June 2020 / Revised: 13 August 2020 / Accepted: 17 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose To evaluate the relationship between the number of laser shots applied during laser photocoagulation treatment and the degree of myopia at 3 years in children with laser-treated retinopathy of prematurity (ROP). Method A total of 68 eyes of 34 infants who had developed prethreshold ROP and were treated by diode laser therapy were included in the current study. Cycloplegic retinoscopic refraction testing was performed in the children at the age of 3 years, and the spherical equivalent (SE) was calculated for all the examined eyes. The number of laser shots that had been applied was compared between the eyes with and without high myopia (SE < − 5 diopters (D)). In addition, the relationship between the difference in the SE values between the two eyes in each infant and the difference in the number of laser shots applied between the two eyes was also analyzed. Results The number of laser shots applied was significantly higher for the eyes with high myopia than for those without high myopia (p = 0.0088), and the number of laser shots applied was significantly positively correlated with the degree of myopia (p < 0.001). A significant correlation was also observed between the differences in the SE values between the two eyes and the differences in the number of laser shots applied between the two eyes (p = 0.0013). Conclusion The number of laser shots applied in photocoagulation treatment for ROP is significantly associated with the degree of myopia seen subsequently in the children. Keyword Laser photocoagulation . Myopia . Prethreshold retinopathy of prematurity . Refractive error
Introduction Retinopathy of prematurity (ROP) is caused by abnormal development of retinal vessels in preterm infants with a low birth
* Ryo Asaoka [email protected] 1
Department of Ophthalmology, The University of Tokyo, Graduate School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
2
Department of Ophthalmology and Microtechnology, Yokohama City University School of Medicine, 4-57 Urafune-cho, Minami-ku, Yokohama, Kanagawa 232-0024, Japan
3
Department of Ophthalmology, Seirei Hamamatsu General Hospital, 2-12-12 Sumiyoshi, Naka-ku, Hamamatsu City, Shizuoka 430-8558, Japan
4
Seirei Christopher University, 3453 Mikatabara, Kita-ku, Hamamatsu, Shizuoka 433-8558, Japan
weight. ROP was first recognized as an important cause of blindness in the 1940s, when the survival rates of low-birthweight babies improved with the introduction of unrestricted oxygen supplementation [1–3], and it still remains the primary cause of preventable visual impairment among prematu
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