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This is to certify that your paper entitled «Six-month longitudinal analysis of visual, tomographic, and densitometric changes after corneal collagen cross-linking in keratoconus» was indexed with 12 pages, in the CIVILICA citation database, code COI:JR_MEHJ-NaN-2025_002, after evaluation and approval of the referees of the "Medical Hypothesis, Discovery and Innovation Ophthalmology Vol 0, Issue 2025 , Year 2025.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above journal and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.