Abstract

BAUZA FORTUNATO, Yaumary et al. Cataract and keratoconus: a refractive surprise. Rev Cubana Oftalmol [online]. 2019, vol.32, n.1  Epub June 30, 2019. ISSN 1561-3070.

Keratoconus is a bilateral corneal ectasia in which the cornea takes on an irregular conical shape due to its thinning and protrusion. The etiology of keratoconus is probably multifactorial. The disease has been classed as rare because of its low incidence. However, it is considered that such incidence will be much more variable and probably greater after expansion of the use of topographs. A male white 68-year-old patient who had attended cataract consultation at the Ocular Microsurgery Center of Ramón Pando Ferrer Cuban Institute of Ophthalmology in May 2017, presents with slow progressive visual acuity reduction in both eyes, greater in the right eye, and an antecedent of prolonged use of contact lenses. Examination revealed the presence of cataracts in both eyes. Preoperative tests were performed and right eye phacoemulsification surgery was planned. Calculation was made of the lens to be implanted to achieve an expected refraction within the range of emmetropia. The final outcome obtained was a postoperative refractive hyperopic surprise, and it was decided to perform a secondary piggy back. The final refractive outcome was close to emmetropia. Because of the great instability of keratometric values in patients with corneal ectasias, the cataract surgeon is faced with the challenge of deciding which is the ideal lens to be implanted to obtain an adequate refractive outcome.

Keywords : Cataract; keratoconus; refractive surprise.

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