Abstract: Disclosed herein is a dome shield for biomicroscopes and/or other optical instruments. The dome shield is rigid and durable as well as optically clear and prevents respiratory droplets from contacting the face and head of the instrument operator during eye exams. The dome shield has a smooth surface and is removable from the instrument for cleaning and disinfection. In a further aspect, the dome shield allows for the adjustment of the interpupillary distance of the instrument oculars without removal of the dome shield. Also disclosed are adapters or seals for holding the dome shield in place and preventing the transmission of aerosols or droplets at the point of attachment of the dome shield to the optical instrument.

Abstract: The present invention includes an automated method for grading the blurring of ocular fundus images to permit automated grading of severity of vitritis. Standard fundoscopic images are converted to gray-scale images. The gray-scale images are processed through a low-pass filter to eliminate high frequency components. The low pass image is subtracted from the corresponding original image, producing the difference image. The difference image is converted to the final entropy image. The entropy image is processed using Fast Fourier Transform to calculate its power. The final blur score is calculated.