In month 6, which eye-related development occurs?

• A. Photoreceptors develop and eyelids can open and close
• B. Color vision is fully developed
• C. Eyelids permanently stay closed
• D. The eyes stop developing

Answer: (A)

During month 6, the eye is finishing a key maturation step: the retina is developing its light-sensing cells, called photoreceptors, and the eyelids, which were fused earlier to protect the eye, begin to separate so they can open and close. This pairing—retinal maturation and eyelid separation—prepares the eye for light exposure and sets the stage for vision after birth. Color vision isn’t fully developed yet at this time; that develops after birth as the brain learns to process visual signals. Eyelids don’t stay closed permanently, and the eyes don’t stop developing—eye development continues through late gestation and after birth.