Background: Differences in ocular parameters between Chinese and Caucasian eyes may lead to differences in the success rate of soft contact lens fittings. As most disposable or frequent replacement lenses are manufactured based on data of Caucasian eyes, the aim of this study was to investigate the clinical performance and factors affecting the preliminary fitting of a 'one-fit' bi-weekly replacement soft toric lens on Hong Kong (HK)-Ch' inese.Method Forty-one HK-Chinese were fitted with Acuvue soft toric lenses (on one eye only). The success rate, the comfort, vision and the effects of central corneal curvature, horizontal visible iris diameter (HVID) and palpebral aperture size (PAS) on the physical fit of the toric lenses were determined. Results: Twenty-four of 41 eyes (58.6 per cent) attained acceptable fit and satisfactory vision with these lenses. The main reason for unsuccessful lens fit was loose fitting. Only central corneal curvatures were significantly correlated (statistically) to the looseness of the lens.
Discussion:The results showed that about 40 per cent of our subjects were unable to obtain acceptable fit with this one-fit frequent replacement lens, the main reason for which was loose fit. This was expected due to the steeper corneas of the Chinese eyes and we would expect similar results with other one-fit soft lenses. Only the central corneal radii were significantly correlated with the looseness of the lens fit. However, this factor was not the main factor affecting the contact lens fitting. HVID and PAS did not appear to play any significant role in the physical fit of this lens. As there are individual variations of lens fitting behaviour, trial lens fitting assessment is the most suitable way to select the appropriate lens.
Malingering manifest as either imitating an ophthalmic disease, or contradiction of ophthalmic disease. In all cases of imitating or denial of ophthalmic disease there is only one reason i.e. Benefit and advantages. Benefit may be financial or nonfinancial. Sometimes it may be the reason for escape of military service or work, depletion of court penalty, tricky way of getting compensation from insurance companies and unnecessary free medicines or medical equipments. Malingerer does everything to cheat ophthalmologist/optometrist. Commonly it is associated with concurrent diagnosis of depression, anxiety, panic attacks, fibromyalgia and psychiatric disorders.
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