It's clear as glass that one of the top attractions in central New York is the Corning Glass Center - even if much of its glass is anything but clear.

The center includes the Steuben Glass Factory, where visitors can see glass art being made; the Hall of Science and Industry, where they can learn about such futuristic glassy stuff as fiber optics, and the Corning Museum, which has the most comprehensive glass collection in the world - more than 24,000 objects.And from now through Oct. 23, the museum also will display the best private European collection of glass: the Ernesto Wolf Collection, which contains pieces from 1500 to 1800.

Corning is near New York's Finger Lakes area, where there are more things to do - wineries, summer theater, antiques, factory outlets, boating, ballooning - than any tourist could possibly want. In addition, the main street in downtown Corning is a gem in terms of restorations. And the Rockwell Museum, in Corning's old City Hall, has the best collection of Old West art east of the Mississippi.

Information: Guest Relations, Corning Glass Center, Corning, N.Y. 14831; 607-974-8271.

There are lots of travelers who spend more time worrying about getting sick than enjoying themselves in foreign lands. They could probably benefit from Traveling Healthy, a new newsletter, written by columnist ("The Healthy Traveler") Dr. Karl Neumann.

The first issue explains how to stay healthy in China, and it gives rational advice, such as "It is a misconception that exotic foods are likely to make you ill. Illness is related to sanitation. There also are tips on tanning, hepatitis vaccine, airport safety, heat stroke, jet lag and other travelers' health concerns.

The eight-page newsletter is published six times a year, for $24. Information: Traveling Healthy, 108-48 70th Rd., Forest Hills, N.Y. 11375.