Latent TB medication

Latent TB means that the person has been exposed to the TB germ but does not have any active infection currently. However there is this possibility that the TB can get reactivated when the immune level goes down for eg in old age and many other causes which decrease immunity.
The doctor will do mantoux which will be positive. chest x ray must be done next which will be negative.
The next thing will be whether the patient is agreeable to take oral isoniazid which is an anti TB drug which is to be taken I think for 6-9 months. You will have to take pyridoxine which is vitamin B tablet to prevent the side effect of isoniazid.
However there is no need to take multiple medications like you do for active TB treatment.
The side effect of isoniazid is it can affect the liver.
However I am not sure whether it causes eye effects. But as far as I can tell this the proper management for latent TB.
I think another drug used for TB treatment will affect eye.
So unless I know the entire list of medications and history unable to help further.