Biomechanical load calculation in lash extensions: transitioning from aesthetics to consumer safety

Abstract

The article is devoted to the study of the calculation of biomechanical load in eyelash extensions as a transition from a purely aesthetic approach to ensuring consumer safety. The purpose of the study is to determine the types of load on natural eyelashes during the extension procedure, to substantiate the standards for its safe implementation and to establish the risks that arise in the event of a mismatch between the parameters of artificial eyelashes and the physiological capabilities of the natural ciliary row. During the scientific study, general scientific methods of cognition were used, in particular, analysis, synthesis, generalization, systematization, comparison, classification and logical modeling. The results of the study show that during eyelash extensions a complex biomechanical load is formed, which is not limited only to the mass of artificial fiber. Gravitational, lever, aerodynamic, mechanical-contact and adhesive loads were studied, each of which affects the condition of the natural eyelash, follicle, eyelid margin and ocular surface. It is shown that exceeding the permissible length, diameter, curvature or mass of artificial eyelashes can lead to mechanical overload, traction alopecia, madarosis, irritation of the cornea and conjunctiva, as well as to the gradual depletion of the natural ciliary row. It is concluded that the safety of the procedure depends not only on the modeling technique, but also on compliance with professional, hygienic, microbiological, regulatory and clinical requirements. The author's methodology LRCA Method was separately studied, within which eyelash extension is considered as a controlled process of preserving and restoring the client's natural resource. It is shown that damage audit, determination of the initial state of the follicle, cuticle and natural row, decompression of weakened eyelashes, reconstruction and preventive safe design layer make it possible to select artificial fiber parameters in accordance with the bearing capacity of the natural eyelash. The practical significance of the study lies in the possibility of using its results to develop safe eyelash extension protocols, train masters and increase the level of consumer protection.