(HealthDay News) -- Here are the latest clinical trials, courtesy of Thomson CenterWatch:
Cataracts
If you have a diagnosed cataract, have a best corrected visual acuity of 10/200 in the other eye, and are scheduled for surgery, you may be eligible to participate in this study.
The research site is in Philadelphia, Penn.
More information
Please see http://www.centerwatch.com/patient/studies/cat41.html 
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Chronic Back Pain
If you are 18 or older and have chronic back pain but are otherwise in good health, you may qualify for this study.
The research site is in Plano, Texas.
More information
Please see http://www.centerwatch.com/patient/studies/cat19.html .
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Breast Cancer
If you are female, 18 or older, and have breast cancer that has metastasized to the brain, you may qualify to participate in this study.
The research site is in West Palm Beach, Fla.
More information
Please see http://www.centerwatch.com/patient/studies/cat29.html .
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