The nurse is assessing the eyes of a client who just received mydriatic eye drops. Which physiological function of the eye will not respond during the therapeutic period after administration of the eye drops?
Explanation & Rationale
Choice A Reason:Accommodation refers to the eye’s ability to change the shape of the lens to focus on objects at different distances. Mydriatic eye drops primarily affect the muscles that control the pupil size, not the lens. While accommodation might be slightly affected due to the dilation, it is not the primary function impacted by mydriatics.Choice B Reason:Refraction is the bending of light as it passes through the lens of the eye to focus on the retina. Mydriatic eye drops do not directly affect the refractive properties of the eye. The primary purpose of these drops is to dilate the pupil, which does not significantly alter the eye’s refractive ability.Choice C Reason:Eye convergence is the simultaneous inward movement of both eyes toward each other to maintain single binocular vision when viewing an object. Mydriatic eye drops do not directly interfere with the muscles responsible for eye convergence. Therefore, this function remains largely unaffected during the therapeutic period.Choice D Reason:Pupillary constriction is the narrowing of the pupil, which is controlled by the sphincter pupillae muscle. Mydriatic eye drops cause the pupil to dilate by relaxing this muscle, thereby preventing pupillary constriction. This is the primary function that will not respond during the therapeutic period after administration of mydriatic eye drops.