Interestingly Apple states that "if a user is myopic in one eye, the optical module associated with that eye may modify the image displayed to correct the user's myopia. The goggle system may determine the correction required for each eye, if any, using any suitable approach. For example, the user may enter a glasses or contact lens prescription that indicates the required correction. As another example, each optical module may automatically analyze the user's eyes, and determine the adjustment needed based on the analysis. This may allow users who normally wear glasses to use the goggle system without their glasses, which may lead to discomfort.