GMAT Sentence Correction (SC) | Re: In what promises to be an alternative to corneal transplantation

Few things we learned from this passage:
1). Scientists claimed to have discovered potent stem cells in the eye
2). The cells possess the ability to restore lost sight
3). This discovery offers a promising alternative to treat blindness

Keep in mind that it is the potent stem cells that possess the ability to restore sight, not the eye itself or the discovery of the cells.

1.In what promises to be an alternative to corneal transplantation in treating blindness caused from damage to cornea,