Local anaesthetics in cataract surgery: do eye drops work be
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A study was conducted to identify the potential benefits and harms of lidocaine injection into the eye in addition to anesthetic eye drops during cataract surgery. 13 studies in 2355 adults, aged 34 to­ 95 years, who had cataract surgery in one or both eyes were found. The studies were conducted in hospitals and eye day-care centres in the USA, Canada, Australia, the UK, Italy, Taiwan, Singapore, India.

What are the results of the review?

Compared with giving anaesthetic eye drops alone, lidocaine injection with anaesthetic eye drops probably:

· reduced the level of pain experienced during the operation;

· reduced the number of people who said they felt any pain during their operation;

· did not reduce the level of pain people said they felt after the operation; and

· did not cause additional eye damage (measured before the operation and after 1 and 12 months).

Lidocaine injection with anaesthetic eye drops may make little or no difference to:

· how many people needed extra anaesthesia during their operation; and

· people's satisfaction with their cataract surgery (we are uncertain about this result because it is based on only one study).

The numbers of unwanted (adverse) effects associated with local anesthetics were similar between people who had eye drops alone and those who had eye drops and a lidocaine injection. But we are uncertain about this result because the type of study we looked at may not have been the best to assess unwanted effects. Lidocaine injection plus anesthetic eye drops probably reduced the level of pain during a cataract operation more than using anesthetic eye drops alone and led to fewer people reporting pain during the operation. However, pain ratings for this operation were generally low both with and without a lidocaine injection, so this difference may not be clinically important.

Lidocaine injection plus anesthetic eye drops did not reduce the level of pain people said they felt after their operation. Although lidocaine injection did not cause additional eye damage, we are uncertain whether its use causes more unwanted effects than eye drops alone.

Source: https://www.cochrane.org/CD005276/ANAESTH_local-anaesthetics-cataract-surgery-do-eye-drops-work-better-or-without-injection-anaesthetic?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+NewAndUpdatedSummaries+(New+and+updated+Cochrane+summaries)
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