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Ophthalmic Images

Enantiomorphism - Cornea for a cornea, eye for an eye

Bhayana, Amber Amar; Prasad, Priyanka; Gupta, Anita

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Indian Journal of Ophthalmology: June 2020 - Volume 68 - Issue 6 - p 1181
doi: 10.4103/ijo.IJO_1785_19
  • Open

Enantiomorphism is the mirror-symmetry between the right and left corneas.[1] We would like to report two different forms of enantiomorphism.[1] Fig. 1a and b represent topography of a “pan-ocular enantiomorphic” 24-year-old male with -4.5DS OU; anterior chamber depth (ACD) 4.10 mm OD, 4.11 mm OS; white to white (WTW) measurement 12.4 mm OD, 12.3 mm OS; axial length (AL) 25.2 mm OD, 25.23 mm OS. He has identical axial lengths and refractive errors and mirror image corneas, which is called pan-ocular enantiomorphism. Fig. 1c and d represent topography of an exclusive “kerato-enantiomorphic” 23-year-old female who is axial anisometrope with -3.25DS/-1.5DC at 170° OD, -6DS/-1.75DC at 10° OS; ACD 3.73 mm OD, 3.71 mm OS; WTW 11.8 mm OD, 11.9 mm OS; AL 25.25 mm OD, 26.23 mm OS. She has axial length asymmetry and thus different refractive errors, yet mirror image corneas, termed kerato-enantiomorphism.

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Figure 1:
(a) corneal topography OD, (b) corneal topography OS of a young male showing pan-ocular enantiomorphism with identical axial lengths and refractive errors and mirror image corneas, thus having mirror image eyes. (c) corneal topography OD, (d) corneal topography OS of a young female showing exclusive corneal enantiomorphism with axial length asymmetry and thus different refractive errors yet mirror image corneas

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

Reference

1. Saad A, Guilbert E, Gatinel D. Corneal enantiomorphism in normal and keratoconic eyes J Refract Surg. 2014;30:542–7
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