I didn't want to wait until minifig heads with glasses patterns were made in LDraw format, so I decided to make my own...glasses for the minifigs to acutally wear, that is.
You can download the four different styles of glasses from the Download Center.
Round glasses. Shown in
silver/chrome.
Oval glasses. Shown in
light gray.
Narrow glasses. Shown in
brown.
Older-style glasses. Shown in
brass/gold.
On the left is a picture showing the first generation glasses I made. (The picture belongs to this page.) Since then I added clear lenses and realized I could change the styles too. Thick rims, no lenses, no nosepiece, no nose!