Sarah Robertson and Johnson Thai

The cornea is the transparent front part of the eye that covers the iris and pupil. When the middle layer of the cornea, the cornea stroma, is wounded, the healing process often causes corneal scars that lead to vision impairment. A corneal scratch is seen here (in black) at the center of the image. Collagen 1 (in green), a key player in wound healing, can be seen surrounding the nuclei of cells closest to the scratch.

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