At the time of birth, vision is focussed from 8 to 12 inches, the distance between a mother's face when feeding at the breast.
Testing eyesight within the womb is difficult. But premature babies at 31-32 weeks g.a possess visual focus and can usually do horizontal and vertical tracking.
By the end of 40 weeks g.a., babies develop proper eyesight with acuity and contrast sensitivity, refraction and accommodation, spacial vision, binocular function, distance and depth perception, color vision, and sensitivity to flicker and motion patterns.
In the uterus, the eyelid remains closed until about the 26th week. The fetus is sensitive to light, responding to light with heart rate accelerations to projections of light on the abdomen. This can even serve as a test of well-being before birth.
Isn't it interesting to know that at 20 weeks g.a., twins in uterus have no trouble locating each other and touching faces or holding hands!
In conclusion, providing a stimulating environment for your unborn baby is worthwhile for his development. However, it is important to note that since the fetus sleeps almost 22 hours a day, he/she would prefer a quiet environment rather than constant loud classical music or Shakesperean poetry.