PURPOSE To evaluate the refractive predictability of a partial coherence interferometry (PCI) biometry device (IOL Master) for cataract surgery and to investigate factors that may affect it. METHODS Retrospective review of 209 eyes from 151 patients that had undergone preoperative PCI biometry and an uneventful phacoemulsification cataract surgery with posterior chamber intraocular lens (IOL)...

In this paper, solutions of the equation LB = AL in the monoid of languages are considered. Characterizations of words u, v and languages A, B which satisfy uA = Bu or Au = vA are obtained. For a language L, properties of a submonoid of the monoid of languages and a congruence defined on this submonoid related to the equation LB = AL are concerned in this paper.

Approximately 10% of the UK Armed Forces, equivalent to 20 000 service personnel, leave the military each year (DASA, 2007). For most individuals, service in the Armed Forces is beneficial but a minority have a bleaker outlook as a result of health, behaviour and social problems, some of which are related to their experiences in military service (Hatch et al., 2013; Iversen et al., 2009; MacMan...