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Fig. 1 | BMC Ophthalmology

Fig. 1

From: The treatment zone decentration and corneal refractive profile changes in children undergoing orthokeratology treatment

Fig. 1

Methods to determine treatment zone decentration. A topographic map before and after orthokeratology treatment. B Method to determine TZ decentration during the 12-month follow-up visit. The red cross indicates the geometric center, the black circle represents the fitted treatment zone, and the black cross indicates the center of the treatment zone

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BMC Ophthalmology

ISSN: 1471-2415

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