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SYMPOSIUM: KERATOCONUS
Year : 2013  |  Volume : 61  |  Issue : 8  |  Page : 394-400

Imaging modalities in keratoconus


1 Department of Cornea and Refractive Surgery, Narayana Nethralaya Superspeciality Eye Hospital and Post Graduate Institute of Ophthalmology, Bangalore, Karnataka, India
2 Department of Cornea and Refractive Service, Swarup Eye Centre, Hyderabad, Andhra Pradesh, India

Correspondence Address:
Himanshu Matalia
Narayana Nethralaya Super specialty Eye Hospital and Postgraduate Institute, Narayana Health City, #258/A, Bommsandra, Hosur Road, Bangalore-560 099, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0301-4738.116058

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Diagnosis of keratoconus has greatly improved from simple clinical diagnosis with the advent of better diagnostic devices like corneal topographers based on placido disc, elevation based topographers and lately optical coherence tomography (OCT). These instruments are quite sensitive to pick up early keratoconus, which could help refractive surgeons to avoid serious complications like ectasia following keratorefractive surgeries. Each of these instruments has their advantages and disadvantages; in spite of that each one of them has its own place in the clinical practice. Currently, placido disc based topographers are the most commonly used topographers all over the world. There are many different companies making such devices, which follow the different techniques and color for the display. Due to these differences they are not directly comparable to each other. Various quantitative indices based on these topographers have been suggested and validated by different authors to aid in the diagnosis and quantification of keratoconus. OCT with its higher resolution and deeper penetration has created its place in the diagnostic armamentarium for keratoconus.


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