_Purpose:_ In order to develop an evidence-based, sport-specific minimum impairment criteria (MIC) for the sport of vision-impaired (VI) shooting, this study aimed to determine the relative influence of losses in visual acuity (VA) and contrast sensitivity (CS) on shooting performance. Presently, VA but not CS is used to determine eligibility to compete in VI shooting. _Methods:_ Elite able-sighted athletes ( n = 27) shot under standard conditions with their habitual vision, and with their vision impaired by the use of simulation (...) spectacles (filters which reduce both VA and CS) and refractive blur (lenses which reduce VA with less effect on CS). Habitual shooting scores were used to establish a cut-off in order to determine when shooting performance was ‘below expected’ in the presence of vision impairment. Logistic regression and decision tree analyses were then used to assess the relationship between visual function and shooting performance. _Results:_ Mild reductions in VA and/or CS did not alter shooting performance, with greater reductions required for shooting performance to fall below habitual levels (below 87% of normalized performance). Stepwise logistic regression selected CS as the most significant predictor of shooting performance, with VA subsequently improving the validity of the model. In an unconstrained decision tree analysis, CS was selected as the sole criterion (80%) for predicting ‘below expected’ shooting score. _Conclusion:_ Shooting performance is better predicted by losses in CS than by VA. Given that it is not presently tested during classification, the results suggest that CS is an important measure to include in testing for the classification of vision impairment for athletes competing in VI shooting. (shrink)

Non-therapeutic performance enhancement in sport is a contentious issue for some time but the issue of therapeutic enhancements has only recently entered the sport vernacular. The purpose of therapeutic assistive devices so far is widely seen as lifting as impaired perceived people back to species-typical norms. However, ?therapeutic? body devices developed to mimic species-typical body structures and expected body functioning, as a side effect, increasingly allow the wearer to outperform the species-typical body in various functions. Unsurprisingly, then, this brings the (...) prospect of people labelled as impaired outperforming the so called non-impaired person in general and the paralympic athlete outperforming Olympic athletes. The ?cheetah? prosthetic legs worn by the South African Paralympic amputee Oscar Pistorius are one example of a ?therapeutic? device that might in the future outperform the species-typical body. Although it does not yet, it has already been labelled as a techno doping device. Others that already outperform are wheelchairs; however, they are rather invisible in the dispute around therapeutic enhancements and sport. This essay highlights various issues attached to this paradigm shift of the ability relationship between disabled and so called non-disabled people, Paralympic and Olympic athletes and what this might mean for Olympism and the Paralympic and Olympic Games. (shrink)