![Ophthalmology on X: "Progressive optic disc cupping over 20 years in a patient with TBK1-associated glaucoma https://t.co/BuawT2MuBI #ophthalmology #glaucoma https://t.co/fnanqYXs7y" / X Ophthalmology on X: "Progressive optic disc cupping over 20 years in a patient with TBK1-associated glaucoma https://t.co/BuawT2MuBI #ophthalmology #glaucoma https://t.co/fnanqYXs7y" / X](https://pbs.twimg.com/media/EMGDXpFXkAErJ1A.jpg)
Ophthalmology on X: "Progressive optic disc cupping over 20 years in a patient with TBK1-associated glaucoma https://t.co/BuawT2MuBI #ophthalmology #glaucoma https://t.co/fnanqYXs7y" / X
![StudyXing Medicine on X: "Cup:Disc ratio < 0.4 = non-glaucomatous nerve; C/D ratio 0.4 - 0.8 is NL disc (physiologic cupping), glaucoma suspect or early to mod glaucoma; C/D ratio 0.8 or StudyXing Medicine on X: "Cup:Disc ratio < 0.4 = non-glaucomatous nerve; C/D ratio 0.4 - 0.8 is NL disc (physiologic cupping), glaucoma suspect or early to mod glaucoma; C/D ratio 0.8 or](https://pbs.twimg.com/media/FoX4VeOaUAAoEgw.jpg)
StudyXing Medicine on X: "Cup:Disc ratio < 0.4 = non-glaucomatous nerve; C/D ratio 0.4 - 0.8 is NL disc (physiologic cupping), glaucoma suspect or early to mod glaucoma; C/D ratio 0.8 or
![Optic nerve with normal cup and increased cup caused by glaucoma: a, b... | Download Scientific Diagram Optic nerve with normal cup and increased cup caused by glaucoma: a, b... | Download Scientific Diagram](https://www.researchgate.net/publication/340671065/figure/fig1/AS:881178169069575@1587100655912/Optic-nerve-with-normal-cup-and-increased-cup-caused-by-glaucoma-a-b-optic-nerve-with.png)