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Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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Sclerotic ring

Introduction

Sclerotic rings are rings of bone found in the eyes of several groups of vertebrate animals, except for mammals and crocodilians.[1] They can be made up of single bones or small bones together.[2] They are believed to have a role in supporting the eye, especially in animals whose eyes are not spherical, or who live underwater.[1] Fossil sclerotic rings are known for a variety of extinct animals, including ichthyosaurs, pterosaurs, and dinosaurs,[3] but are often not preserved.

References

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  1. ↑ 1.0 1.1 Motani, Ryosuke. “Eyes”. Retrieved 2007-07-06.
  2. ↑ “Palaeos Vertebrates: Glossary S”. Retrieved 2007-07-06.
  3. ↑ Pigdon, Dann. “Re: Sclerotic ring in eyes”. Retrieved 2007-07-06.

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