| http://www.w3.org/ns/prov#value | - ???While a patient???s eyes will naturally drift outward when performing lengthy near work, the process of turning the eyes in to maintain fixation can lead to such symptoms as eyestrain and visual fatigue that may result in headaches,??? says Dr. Krall. ???But the base-in prism in the reading area can assist the normal binocular function of a patient???s eyes for more comfortable near work for lo
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