Encephalitozoon cuniculi is a cause of focal anterior cortical cataract and anterior uveitis in cats.

Purpose Quantity of tear film lipids could be estimated optically by colours of interference By photometric evaluation it may be measured. Therefore we compared both measures. Methods Patients with dry eyes were observed by Tearscope and Meibometer 550. For tearscope we used the 4‐parted scale of colours. Meibometry was performed with clean stripes, which have touched the tear film. >300 units are said to be normal. We observed the tear film by Schirmer I, Lissamin green and fluorescein staining, and the break up time. We correlated the measurements with Pearson Correlation. Results 85 eyes of 53 patients were observed. Both measurements of the lipids showed positive correlations R=67. There was no Correlation between any lipid measurement and the watery and mucin Layer (R‐0,1 ‐ 0,3) Conclusion The measurement of lipids is similar in both measurements. The optical evaluation needs longer experience, the Meibometry needs standards to find reproducible results. The lack of correlation between lipid layer results and the other results of the tear film observation may point at the special function of lipids independent of the other layers of the tear film.

This report describes three cases of bilateral macrophakia in 3-, 5-, and 9-year-old cats, respectively. All cats were presented because of visual deficits. Ophthalmic examination revealed macrophakia (the vitreous was replaced by the lens) and retinal changes (tapetal hyper-reflectivity, attenuation of retinal vessels, and retinal folds) in all cats. In addition, bilateral subconjunctival orbital fat prolapse in one cat and microphthalmos in another cat were present. To confirm the ophthalmologic diagnosis of macrophakia, gross pathology examination in one cat and ultrasound examination in another cat were performed.

Purpose Evaluation of measuring errors in usage of the meibometer550. Methods Measurements of lipid layer of the ocular surface tear film were done by Meibometer 550. For exact measurement we observed possible disruptions, the calibration, hygienically standards, different sampling, alteration after topical treatment.Before each measurement there must be a calibration by clean lipid ‐free stripes.We observed the adjustment with two clean stripes by double measurement of each other.Both results must be 0. Hygienically influence is presumed by incorrect handling if objects are touched. Stripes were pressed on objects and measured.Those objects were the table surface, the hand of the observer, the gloves and the disinfectant used.We observed different pressure sampling as pressure may extract more lipids from the lid with touch of the lid and no touch, with pressure and without For the influence of topical treatments we dropped several artificial tears directly on the stripes, watery artificial tears, gels, ointments and drops with lipid portions. Results After double calibration new stripes showed values of nearly 0, elder stripes 10‐18 u. Hygienically: in clean tables we measured <28u, even clean hand < 60 u, gloves < 5u. Disinfectant fluids decreased measured lipids from 500 to 100 u. There was a difference in sampling with pressure to samplings without pressure between 50 and 80%. Topical treatments changed different after use of watery drops: 0‐15u, lipid spray: change 370 u average, fatty ointments: change of 557u to 751 u. Conclusion It is important to notice the careful handling during measuring the lipid layer with MB 550 to obtain valid measuring data. Commercial interest