For those who still suffer a twinge of guilt shelling out cash every morning for a cup of coffee might want to see this. An extract in coffee may prevent retinal degeneration.

Researchers at Cornell University knew that CGA (chlorogenic acid) has been associated with weight loss and lower blood pressure.

As if that's not enough justification for that morning cup or two, those researchers set out to see if CGA could prevent hypoxia (oxygen deprivation) in the retina. Their hunch turned out to be correct.

The findings were published in the Journal of Agricultural and Food Chemistry not long after newspapers published articles about coffee prices having doubled in the past year.(A severe drought in Brazil ruined roughly a third of the world's coffee crop.)

At least as prices reach consumers, scientists are brewing some comfort. Coffee may reduce the risk of type 2 diabetes, increase energy, lower the risk of dementia, fight depression and extend people's lives.

And now we have reason to think that coffee might also ward off macular generation and glaucoma.

It's another good reason to wake up and smell the coffee.