Why eyelid inflammation keeps coming back, how to tell a stye from a chalazion, why antibiotics are rarely the answer, and the lid care routine that actually works.
What macular degeneration does to central vision, why straight lines going wavy is the symptom that needs acting on within days, and what treatment can do for each of the two forms.
What short sight and long sight actually are, why long-sightedness is not the same thing as presbyopia, and why childhood short sight is now treated as something worth slowing rather than simply correcting.
Why glaucoma causes no symptoms until sight has already been lost, who is most at risk, how it is found, and what treatment can and cannot do about it.
What a cataract is, why nobody has to wait for one to ripen before surgery, what the operation actually involves, and why clouding years later is not the cataract coming back.
NHS dental charges work in bands, and for a great many people treatment is free. Finding a practice taking NHS patients is now the harder half of the problem.
What a tooth needs depends on how much sound tooth is left: a filling, something that holds it together, or a decision about whether to replace it at all.