These are hereditary multiple corneal turbidities. They are called by the appearance of turbidity (annular, macular, granular, mesh, crystal, drop), or according to the authors (Meesman, Cogan, Reis Buckler, Groenouw, Biber, Schnyder, Fuchs, etc.).
Treatment:
Turbidity, which can significantly reduce the visual acuity, requires corneal transplantation. Genetic counseling is recommended.