What is the difference between subjective and objective refraction?

The correct choice highlights the key distinction between subjective and objective refraction techniques in optometry. Subjective refraction involves assessing the patient’s vision based on their feedback regarding different lens options during the exam. The optometrist interprets this feedback to determine the best prescription, relying on the patient's responses about which lenses provide clearer vision.

On the other hand, objective refraction is done using instruments such as autorefractors or retinoscopes to measure the eye's refractive error without any input from the patient. This method provides a baseline measurement of how light is refracted as it passes through the eye, making it an essential tool for obtaining initial refraction data.

Understanding this distinction is crucial as it determines how prescriptions are formulated and how patient interactions occur during vision assessments. The other options do not accurately capture the fundamental differences in methodology and application between subjective and objective refraction. For instance, while subjective refraction can be highly accurate based on individual patient input, claiming it is inherently "more accurate" oversimplifies the nuances of both methods. Likewise, the assertion that objective refraction is exclusively for children is incorrect, as it can be used for patients of all ages.