As per my understanding, you want to know whether retinitis pigmentosa can lead to optic atrophy. Retinitis pigmentosa (RP) is rare degenerative disease affecting the rod photoreceptors in the retina. The optic disc in RP may show optic atrophy, usually defined as a 'waxy pallor' of the disc, and is assumed to be a due of photoreceptor degeneration. Consult an ophthalmologist to rule out the cause in your case and to also guide you for further course of management. You can refer - Best Ophthalmologists in India, to sought consultation!