MAP2K7 and retinal detachment: These effects include clinical findings of chorioretinopathy and serous retinal detachment, which, if symptomatic, present with symptoms of blurred vision, halos around lights, and colorful spots in the vision.11,17,19-21 Although many patients with ocular adverse effects are asymptomatic or have only mild symptoms, some of these effects can have vision-threatening potential.17 Therefore, these side effects are important for practitioners to be aware of as MEK inhibitor usage increases.