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Q&A: Examining whether 3-D products can affect children's health

Ivan Penn, who writes the Consumer's Edge column that appears regularly in the Times, also answers reader questions about consumer issues on our website (; look for Consumer's Edge heading). We occasionally publish some of those in this space.

Studying risk of 3-D products

With the expected increase in 3-D games, what can you tell me about the effects of 3-D digital products on children's eyesight?

First, there are no conclusive studies on the short- or long-term effects of 3-D digital products on eye and visual development, health or function in children, according to the American Academy of Ophthalmology.

In response to a recent statement by Nintendo and other 3-D device companies, the academy issued a statement regarding its assessment of risk.

The academy noted that development of "normal 3-D vision in children is stimulated as they use their eyes in day-to-day social and natural environments, and this development is largely complete by age 3 years."

Some children who have eye conditions might have difficulty viewing 3-D images. If a healthy child consistently develops headaches or tired eyes or cannot clearly see the images when using 3-D products, this may indicate a vision or eye disorder and you should contact an eye doctor.

Issuers may lower credit limit

Is there a way to ensure that the credit card company does not reduce my credit limit when I make regular payments, which some seem to be doing to inflate credit utilization percentages?

Bill Hardekopf of says there is no regulation that says card companies cannot lower a person's credit limit.

"I don't believe there is any way for a consumer to ensure that your credit limit will not be cut," Hardekopf said. "A consumer tip would be to make sure you are aware of your credit limit and watch your statement to make sure it hasn't been lowered and if it has, to call and request that it be brought back to the level it was."

Most flight deals: 3 p.m. Tuesday

What is the best day to buy airline tickets?

Travel experts say Tuesday is the best day to buy airline tickets. The Wall Street Journal adds that Wednesday is also a good buying day, but deals usually begin dropping off by Thursday and into the weekend.

According to the Journal, Rick Seaney, chief executive of, studied three years worth of airline prices and concluded that 3 p.m. Eastern time Tuesday was the best time to buy. "That's when the maximum number of cheapest seats are in the marketplace," he said.

Q&A: Examining whether 3-D products can affect children's health 02/27/11 [Last modified: Sunday, February 27, 2011 3:30am]
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