Thank you for the reply and additional information.Reduced vision
for distance for nearly two years does need to be evaluated further in detail. There are a number of causes for gradual progressive diminished vision such as early cataract, simple glaucoma, age related macular degeneration, uncorrected refractive error, diabetic retinopathy
, corneal degeneration and so on. Since there is no history of diabetes or glaucoma, these causes are less likely in your case. But I guess a detailed eye exam by an ophthalmologist
to look out for other causes is better lest they are missed out( may not have been present in the last eye exam).
As for the chronic redness and grittiness
in the eyes, it is likely that you have eye strain or eye fatigue or dry eyes
( can occur from long hours of reading /writing/viewing computer etc). You can initially try with lubricating eye drops such as preservative free Refresh tears, 1 drop 4 times a day for a month. It is available over the counter. If symptoms do not improve by then, then it is better to get your eyes examined in detail by an ophthalmologist, both for the reduced vision and the dry eyes symptoms.
Please feel free to ask follow up questions , if any.Thank you and best wishes
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Views expressed are for information purpose only and cannot substitute a visit to an ophthalmologist