As we grow older, our eyes slowly change: our vision is sometimes blurred and heavy, we gradually can’t read cell phone books and newspapers for long, the prescription of our glasses seems to keep deepening, how to adjust the optometry is not good, our vision fluctuates significantly in different light, and the colors of seeing things are not as vivid as before …… can’t help but wonder. “Seeing things more and more confused, is it a cataract or glaucoma?” Indeed, many people know that both cataracts and glaucoma are the most common progressive blinding eye diseases in elderly patients. Cataracts are caused by a clouding of the lens that blocks light from entering the eye and affects vision. Glaucoma is a visual impairment caused by damage to the optic nerve due to abnormally high intraocular pressure. The vision loss caused by cataracts is reversible and reversible, while the vision damage caused by glaucoma is irreversible. There is a significant difference in the prognosis between the two. It is worth noting, however, that the development of cataracts can sometimes gradually and quietly induce other eye pathologies. Some cataracts seem to have little effect on vision at first, but as age increases, the lens, like a sponge, absorbs water and expands and thickens, occupying the space inside the eye and blocking the flow of normal fluid, resulting in intermittent or acute increase in intraocular pressure, which may unknowingly trigger the development of glaucoma or lead to sudden acute attacks. This condition is particularly prevalent in people with hyperopia, prolonged close eye use, and relatively narrow eye structures. The onset of glaucoma and visual impairment is usually insidious, and by the time a serious loss of visual function or an acute painful attack occurs, the condition is often more severe. There are also a few patients who are afraid of treatment because they are too troublesome or because they do not understand it. They allow the cataract in one eye to develop to the mature stage or overripe stage and then the lens tissue becomes degenerative and abnormal, inducing protein allergic reaction or crystal dislocation to form secondary glaucoma leading to severe pain and seriously affecting their lives. Often the best time for treatment is missed and patients and family members are surprised and regret: “I only know that it doesn’t matter if cataracts are delayed, how can they become glaucoma? . Therefore, cataract and glaucoma are not unrelated diseases. The age of cataract development is also the age of glaucoma development, and it is entirely possible for both to occur and develop in one eye. Therefore, it is important to follow up with regular structural and functional eye examinations and IOP measurements.