Final answer:
Drawing rays to scale involves placing an object at the near point and using the thin lens formula to ensure the image is formed precisely at the retina.
Step-by-step explanation:
To draw rays to scale to locate the image at the retina if the eye lens has a focal length of 2.5 cm and the near point is 24 cm, you would place an object at the near point. According to the thin lens formula 1/f = 1/do + 1/di, where do is the object distance, di is the image distance, and f is the focal length. You can substitute the given values and find that the image distance di needs to be equivalent to the lens-to-retina distance (2.5 cm) to produce a clear image on the retina, which is the goal of this exercise.