Halo sign in keratoconus: a case report.

ABSTRACT:

Background

There are several clinical signs that may contribute to the diagnosis of keratoconus. Their appearance is associated with the evolution of keratoconus. In this case, the formation of a halo on the iris in a patient with stage IV keratoconus was reported. This halo sigh is a novel one and has not been reported earlier.

Case presentation

A 30-year-old woman presented to the ophthalmology clinic with one year history of vision deterioration to finger counting in her left eye. A diagnosis of keratoconus was made due to the inferior-central corneal steepening and thinning. When the slit-lamp light projects onto the cone, a halo forms on the iris and shifts its shape and location as the irradiation angle changes.

Conclusion

A halo sign was observed on the iris of

SUBMITTER: He H 

PROVIDER: S-EPMC12502615 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature