Which sequence describes the formation of the image on the retina?

Which sequence describes the formation of the image on the retina?

• A. Corneal refraction, lens accommodation, and retina image capture.
• B. Lens accommodation, corneal refraction, retina image capture.
• C. Retina image capture, corneal refraction, lens accommodation.
• D. Corneal refraction, retina image capture, lens accommodation.

Answer: (A)

Light entering the eye is bent first by the cornea, which provides the majority of the eye’s focusing power. The light then passes through the pupil to the crystalline lens, which can change shape (accommodation) to fine-tune focus so objects at various distances land as a sharp image on the retina. Only after this optical focusing is the image formed on the retina, where photoreceptors detect light and begin transduction into neural signals. So the correct sequence is corneal refraction, lens accommodation, retina image capture. If you tried to place lens accommodation before corneal refraction, or retinal capture before proper focusing, the image would not be formed sharply on the retina.

Light entering the eye is bent first by the cornea, which provides the majority of the eye’s focusing power. The light then passes through the pupil to the crystalline lens, which can change shape (accommodation) to fine-tune focus so objects at various distances land as a sharp image on the retina. Only after this optical focusing is the image formed on the retina, where photoreceptors detect light and begin transduction into neural signals. So the correct sequence is corneal refraction, lens accommodation, retina image capture. If you tried to place lens accommodation before corneal refraction, or retinal capture before proper focusing, the image would not be formed sharply on the retina.