1.   ...corneal scars.

2.   Local retinal surgeon Dr. Armie Harper says the white appearance may have been caused by cataracts or perhaps a corneal scar.

3.   Retinal surgeon Dr. Armie Harper says the white appearance may have been caused by cataracts or perhaps a corneal scar.

4.   Unsuitable candidates can include those with large pupils, retinal problems, corneal scars or severe astigmatisms.