Blurred images are usually the result of a dirty, scratched or broken objective. "Black spots" are dirt particles in the eyepiece or dirt particles on head prism or mirrors. The following method works on them all:
The front lens of the objectives (particularly the 40X) should be cleaned after use by first brushing with a soft camel-hair brush to remove particles of dust, then by wiping gently with soft lens tissue, moistened with Xylene or clean distilled water and drying with clean lens paper immediately following. The objective should never be taken apart except by a qualified repair person. If dust is seen on the back lens of the objective, an all-rubber ear syringe or enema tube may be utilized to blow the dust out.
The eyepiece may be cleaned in the same manner as the objectives, except in most cases Xylene will not be required. In most instances breathing on the lens to moisten it, then wiping dry with clean lens tissue will be sufficient to clean the surface.
The finish of Optika microscopes is hard epoxy and is resistant to acids and reagents. Clean this surface with a damp cloth and mild detergent.
Note: Use alcohol for difficult cleaning and as a last resort Xylene or Acetone. Be forewarned that use of these chemical cleaners will destroy lens coatings!
If the problem requires more than a simple cleaning, your Optika Representative can refer you to an experienced microscope service dealer in your area.

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