What is the primary method to medically manage a potentially visual eye with posterior lens luxation?

The primary method to medically manage a potentially visual eye with posterior lens luxation involves the use of a mydriatic agent. Mydriatic agents are medications that dilate the pupil, which can help improve the outflow of intraocular fluid and reduce the risk of complications associated with lens luxation, such as glaucoma. By dilating the pupil, these agents can also provide more room for the luxated lens and help maintain retinal health, thereby preserving vision.

Other methods such as topical corticosteroids or anti-inflammatory injections typically focus on reducing inflammation, which may not directly address the issues presented by lens luxation. While referral for surgery is a potential option, it would likely be considered when medical management is insufficient or if the luxation has caused significant complications. Therefore, using a mydriatic agent stands out as the primary medical management strategy to help stabilize the condition of the eye while preserving potential vision.