"What do you mean, genetic link?"

"Generally, a genetic test can help determine which gene is mutated that would cause the eye tissue to remain undeveloped. There's a bit of research surrounding anophthalmia. From what I understand, transcription factors are often the culprit. The names of these transcription factors are a little weird. From a cursory glance at the literature, SOX2 and PAX6 might be likely culprits."