October 25, 2017
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Corneal hysteresis lower in moderate/severe obstructive sleep apnea

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Researchers may have discovered another link between obstructive sleep apnea syndrome and the development of glaucoma, with a cross-sectional observational study on corneal hysteresis.

Patients underwent overnight polysomnography for assessment of obstructive sleep apnea syndrome (OSAS).

Researchers measured central corneal thickness using biometry, corneal hysteresis using ocular response analysis, IOP and Humphrey visual field.

Patients were divided into normal, mild, moderate and severe OSAS categories.

A total of 56 patients were classified as normal and mild categories and placed into group 1, and 61 patients were moderate and severe and made up group 2.

Corneal hysteresis was lower in group 2, according to researchers. They found a significant difference in corneal hysteresis between the OSAS groups.

One reason for the change may involve a coupled connective tissue and vascular abnormality associated with floppy eyelid syndrome, which is linked to OSAS, the researchers proposed.

Another reason could be reduced rapid eye movement sleep.

Researchers did not find statistically significant differences in central corneal thickness or visual indices between the groups.

Researchers conclude that it may be helpful to monitor patients with more severe OSAS for the development of glaucoma. – by Abigail Sutton

Disclosures: The authors report no relevant financial disclosures.