Rating of tinted ophthalmic lenses

摘要

This study aims at establishing the relationship between the spectral transmission characteristics of tinted ophthalmic lenses and the visual percept of the observer looking through. We hypothesise that the rating of tinted lenses originates from what the observer sees rather than what the glass looks like. We develop a model for colour acceptance by calculating the colour distortions for a collection of coloured surfaces that are representative of the real environment using the spectral reflectance of the surfaces and the spectral transmittance of the lens. Then we apply the model to a collection of real tinted ophthalmic lenses and derive statistical indices that describes the global colour distortion induced by each lens. Preliminary results show a significant agreement between the subjective rating and the objective colour distortion index. We conclude that our model allows to predict the acceptance/rejection judgement of observers for a tinted ophthalmic lens of known spectral transmittance.