Resumo

HERNANDEZ SILVA, Juan Raúl et al. Densitometric study of the crystalline lens and its relationship with the LOCS III system. Rev Cubana Oftalmol [online]. 2013, vol.26, n.2, pp. 191-197. ISSN 0864-2176.

Objective: To determine the nuclear hardness of the crystalline lens according to the Lens Opacities Classification System (LOCS III) and its relationship with the crystalline lens densitometry. Methods: A prospective, cross-sectional and descriptive study was conducted in 290 patients diagnosed with cataract and operated on by the prechop phacoemulsification technique plus intraocular lens implantation, at "Ramon Pando Ferrer" Cuban Institute of Ophthalmology from January to December, 2011. Results: The crystalline lens nuclei classified as N1 to N6 increased the lens crystalline densitometry up to 46.5%, with effective phacoemulsification time of 0.54min with respect to the .nucleus hardness; the densitometry value in the nuclei classified P2 to P5 rose to 66.1% where the effective phacoemulsification time was 0.46. The average patients' age was 63.8 years, the expected refraction was planned to be -0.16D, the postoperative spherical equivalent was 0.50 D and the mean induced astigmatism reached -0.56 D. The best uncorrected visual acuity improved by 0.81 in the postoperative period and the final corrected acuity was 0.96. Conclusions: The densitometric study of the crystalline lens, as concrete value of hardness, allows the surgeon to draw an adequate surgical strategy for each patient in order to make a real customized refractive surgery of the crystalline lens and to obtain the optimal visual results.

Palavras-chave : cataract; crystalline lens densitometry; astigmatism; phacoemulsification; nuclear hardness; refractive surgery.

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