tokens: Spherical lenses and " miotic " eye drops can provide relief in some types of horizontal strabismus by biasing the neural link between " convergence " ( orienting the lines of sight for near objects ) and " accommodation " ( focusing ) , and prism lenses can relieve " diplopia " ( double vision ) by refracting the visual axis , but these treatments do n’t address the underlying muscular imbalance , and are not further considered here .