If your eye feels weak or your vision is changing, you should see an eye doctor (ophthalmologist) as soon as possible for a thorough examination. This may be caused by simple eye strain, refractive errors, or underlying conditions such as glaucoma or optic nerve issues. Avoid straining your eyes, ensure proper lighting, and do not self-medicate until a doctor evaluates you. Early assessment is important to prevent worsening and guide appropriate treatment.