Cataracts. Investigate suggests that top ingestion of vitamin A within the diet regime is associated with a reduced risk of establishing cataracts.Kadang-kadang dikenal dengan nama merek dagang Eastman Kodak Irtran-five, meskipun sebutan ini sudah lama usang. MgO murni kristal tersedia secara komersial dan hanya sedikit digunakan dalam optik infram