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An appeals court has given Utah state attorneys more time to respond in a lawsuit over a hotly contested law banning minimum prices for contact lenses that could have wide-ranging effects on the $4 billion industry.

The 10th Circuit Court of Appeals granted a request Friday to delay a deadline to file new documents in the case.

The state is defending the law after the nation's largest contact lens makers sued to block it.

Alcon, Johnson & Johnson and Bausch & Lomb say the measure is an unconstitutional overreach designed to help Utah-based discount seller 1-800 Contacts disregard minimums prices set by manufacturers in sales to people all over the country.

Utah lawmakers say it's meant to bolster competition, not help any one company.

New briefs in the case are due later this month.