yes cataracts are directly linked to uveitis. most often they are very dense cataracts initially of the subcapsular type. cataracts can also be brought on by the corticosteroids used to treat uveitis and other diseases. topical, injectible and oral steroids are cumulative in their effect. half of individuals who use topical steroids will start to develop cataracts after about 850 drops of 1% prednisilone acetate (equivilent to pred forte).

Blepharitis causes the glands which secrete the lubricant part of the tear film, the myebomian glands located along the hairline of the eyelid to become plugged up. this can be from a pathogen or related to systemic diseases.
often it is related to the lacrimal gland not secreting fluid for the tear film related to Severe Dry eyes. the Lacrimal gland can become inflammed from autoimmune attack on it. it is frequently seen in HLA B27 systemic autoimmune conditions related to uveitis. it is also seen in Systemic Lupus Erythematosus, Sjorgren's syndrome and many of the Connective tissue disease processes and Sarcoidosis. depending on the cause, various treatments are available for Blepharitis. often washing the eyelashline with a mild solution of baby shampoo and warm water while gently massaging along the lash line will break up 'plugs' from thickened secretion and allow them to flow again. if dry eyes is present, it is advised to instill a lubricating eyedrop prior to this so that the secretion can mix with the eyedrop creating a better tear film. the Antibiotic Doxycycline is sometimes given for it's anti inflammatory effect as well as for treating bacterial cause of blepharitis.
for severe dry eyes that doesn't respond to punctal plugs, cauterization of the puncta or Restasis, Immunomodulation has proven effective. articles on all of this can be found in the LEARNING ABOUT OCULAR INFLAMMATORY DISEASE forum.

Wish you the best,
Mike