Sonnet 24, by NY Shakespeare Exchange

Mine eye hath played the painter and hath steeled,
Thy beauty's form in table of my heart;
My body is the frame wherein 'tis held,
And perspective that is best painter's art.
For through the painter must you see his skill,
To find where your true image pictured lies,
Which in my bosom's shop is hanging still,
That hath his windows glazed with thine eyes.
Now see what good turns eyes for eyes have done:
Mine eyes have drawn thy shape, and thine for me
Are windows to my breast, where-through the sun
Delights to peep, to gaze therein on thee;
     Yet eyes this cunning want to grace their art,
     They draw but what they see, know not the heart.

Sonnet 24, from The Sonnet Project, by the New York Shakespeare Exchange.

It is about how the eyes are an instrument of desire, fashioning a lover and infusing oneself with that very lover.  Not just her image, but also her body.  Shakespeare weaves a rather rich tapestry, that is about what art does.  What imagination, and fantasy, and dream are.  The desire is so strong that what we see looks, and feels, positively real.  Alas, though, it is not.  Actor Colin Ryan plays it all well.