I have no idea what LASIK (laser eye surgery) surgeons are thinking when they perform surgery on engineers with large pupils, let alone engineers with 10-mm pupils when dark adapted (Figure 1). Figure 1. 10-mm dark adapted pupil. Such an engineer sought out our office for a scleral fitting...
Read moreIntroduction Traditionally, gas permeable, scleral and even hybrid contact lenses are recommended for patients with keratoconus or other diseases that cause irregularity of the cornea, as they can effectively correct the significant levels of astigmatism through neutralization by the tear film. However, there is evidence to support the use...
Read moreBackground Post-surgical ectasia is a complication in which a cornea that has undergone a refractive surgical procedure becomes progressively irregular and thinned leading to protrusion and undesirable visual disturbances such as blur and higher order aberrations. When screening a candidate for LASIK, many factors must be considered to reduce...
Read moreIntroduction The vast majority of the lenses we fit in contact lens practice are soft lenses. The amount of attention that goes into ‘fitting’ soft lenses is limited in contrast to the focus on scleral lens fitting, corneal lens fitting, and orthokeratology, for instance. This case shows how taking...
Read moreIntroduction Acanthamoeba is a free-living unicellular protozoon commonly found in fresh water and soil. The protozoa can be found in two forms: a metabolically active trophozoite and a resistant cyst. Acanthamoeba keratitis (AK) is an infection primarily associated with soft contact lens wearers who demonstrate improper contact lens hygiene...
Read moreFor those readers who may not have read the first part of this article here’s a brief recap: I have been describing the case of a typical soft lens dropout patient, Natasha, who works in the office and kindly agreed to participate in our investigation. She would dearly like...
Read moreCould a “Soft Lens Dropout” be a potential patient for the Speciality Lens Practitioner? Patient dropout and the reasons for it have long since been a subject of discussion within both the contact lens industry and profession. Speciality lens manufacturers normally supply lenses for patients who are perhaps more...
Read morePenetrating keratoplasty in patients with keratoconus may provide good long‐term visual rehabilitation. There is a relatively low rate of graft failure in this cohort of patients. Graft rejection has been reported to be 5.8–41% with most rejections occurring in the first 2 years. [1-5]. Irregular and high astigmatism may be common...
Read moreIntroduction Limbal stem cell deficiency (LSCD) results in dysfunction and/or loss of the stem cells in the basal limbal area. These cells are responsible for maintaining and replenishing the corneal epithelium. This change in corneal tissue composition results in conjunctival epithelial ingrowth, persistent epithelial defects, chronic inflammation, and neovascularization.1,5 There...
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