Philip Larkin

In everyone there sleeps. A sense of life lived according to love. To some it means the difference they could make. By loving others, but across most it sweeps. As all they might have done had they been loved. That nothing cures.

Innate mechanisms endow the visual system with highly specific connections, but visual experience early in life is necessary for their maintenance and full development. Deprivation experiments demonstrate that neural connections can be modulated by environmental influences during a critical period of postnatal development.