J.ophthalmol.(Ukraine).2021;6:3-7.
http://doi.org/10.31288/oftalmolzh2021637
Received: 28 June 2021; Published on-line: 21 December 2021
Exploring the features of keratometry readings in premature children
I. A. Soboleva1, Y. Y. Borysenko2
1 Kharkiv Medical Academy of Postgraduate Education; Kharkiv (Ukraine)
2 Hirshman Municipal Clinical Hospital No.14, Kharkiv City Council; Kharkiv (Ukraine)
E-mail: aps142d@gmail.com
TO CITE THIS ARTICLE: Soboleva IA, Borysenko YY. Exploring the features of keratometry readings in premature children. J.ophthalmol.(Ukraine).2021;6:3-7. http://doi.org/10.31288/oftalmolzh2021637
Background: It is important for pediatric ophthalmologists to explore the keratometry parameters used in selection of contact lenses (and thus to improve visual function, quality of life, and treatment of complications of refractive errors) in premature children who received laser photocoagulation (LPC) to the avascular retina for threshold retinopathy of prematurity (ROP).
Purpose: To assess the keratometry parameters in premature children who received LPC to the avascular retina for threshold ROP for the advanced improvement of visual functions and advanced treatment of complications of refractive errors in this category of patients.
Material: We retrospectively examined the medical records (including automatic keratometry results) of 282 children (564 eyes).
Results: There was a significant difference in corneal refractive power (CRP) in the steepest principal meridian and the flattest principal meridian between children of group 1 (i.e., premature children who received bilateral LPC) and group 2 (i.e., premature children who did not develop threshold ROP by the time retinal vascularization was complete) (р=0.00007 and р=0.0001, respectively) and between children of group 1 and group 3 (randomly selected full-term children) (р=0.000002 and р=0.000001, respectively), and mean CRP was higher in children who received LPC than in those who received no LPC. A significant difference in CRP between the steepest principal meridian and the flattest principal meridian (р=0.015) was found only for the comparison between the children who received LPC and controls. The value of this parameter was larger in children who received LPC than in full-term children.
Conclusion: These findings may be helpful when selecting optical correction (e.g., orthokeratology correction) for refractive errors in the premature children who received LPC.
Keywords: retinopathy of prematurity, kerastometry, contact lens correction
References
1.Koretz JF, Rogot A, Kaufman PL. Physiological strategies for emmetropia. Trans Am Ophthalmol Soc. 1995;93:105-18; discussion 118-22.
2.Fincham EF. The proportion of ciliary muscular force required for accommodation. J Physiol. 1955; 128:99-112.
3.Rykov SO, Shargorodska IV, Barinov IuV, Denisuk LI. [Refractive and accommodative errors. Locally adapted evidence based guidelines]. Decree No.827 of the Ministry of Health of Ukraine dated December 8, 2015]. Ukrainian.
4.Rykov SO, Iaremenko NM, Kharchenko LB. [Comprehensive examination of the eye and vision. Locally adapted evidence based guidelines]. Kyiv: Derzhavnyi ekspertnyi tsentr Ministerstva okhorony zdorov’ia Ukrainy; 2019. Ukrainian.
5.Snir M, Friling R, Weinberger D, et al. Refraction and keratometry in 40 week old premature (corrected age) and term infants. Br J Ophthalmol. 2004;88:900-4.
6.Polishchuk OS. [Diagnostic evaluation of the eye using a keratometer: A Collection of works]. Kyiv: FNMI NTTU KPI; 2016. Ukrainian.
7.Zavgorodnia NG, Sarzhevska LE, Ivakhnenko OM. [Ocular anatomy. Ophthalmological examination techniques]. Zaporizhzhia: Zaporizhzhia State Medical University; 2017. Ukrainian.
8.Polishchuk OS, Koziar VV. [Selecting the optimal illumination source for keratometer]. [Proceedings of the international conference]. Warsaw, 2018. Polish.
9.Sokurenko VM, Tymchyk GC, Chyzh IG. [Human eye and ophthalmic devices]. Kyiv: National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’; 2009. Ukrainian.
10.Polishchuk OS, Koziar VV. [Selecting the optimal variant for diagnostic projections on the eye in keratometry]. Biomedychna inzheneriia I tekhnologiia. 2018;1(1):86-91. Ukrainian.
11.Polishchuk OS, Koziar VV. [Keratometry as the first stage of IOL implantation]. [Proceedings of the 3rd International Conference on International Systems and Technologies in Medicine]. Kharkiv: Zhukovskyi National Aerospace University ‘Kharkiv Aviation Institute’; 2020. p. 208-10. Ukrainian.
12.Yang CS, Wang AG, Shih YF, et al. Astigmatism and biometric optic components of diode laser-treated threshold retinopathy of prematurity at 9 years of age. Eye (Lond). 2013 Mar;27(3):374-81.
13.Repka MX. Refraction and keratometry in premature infants. Br J Ophthalmol. 2004 Jul;88(7):853-4.
14.Swarbrick HA. Orthokeratology review and update. Clin Exp Optom. 2006 May;89(3):124-43.
15.Baker PS, Tasman W. Myopia in Adults with Retinopathy of Prematurity. Am J Ophthalmol. 2008 Jun;145(6):1090-4.
16.Connolly BP, Ng EY, McNamara JA, et al. A comparison of laser photocoagulation with cryotherapy for threshold retinopathy of prematurity at 10 years: Part 2. Refractive Outcome. Ophthalmology. 2002 May;109(5):936-41.
17.Ecsedy M, Kovasc I. Scheimpflug imaging for long-term evaluation of optical components in Hungarian children with a history of preterm birth. J Pediatr Ophthalmol Strabismus. 2014 Jul 1;51(4):235-41.
Disclaimer: The authors state that the views expressed in this article are their personal and not the official positions of the institutions.
Sources of Support: no.
Conflict of Interest: The authors declare no conflict of interest which could influence their opinions on the subject or the materials presented in the manuscript.