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Table 1 Summary for the influence of illumination on the visibility of the main features of tear microdesiccates

From: Progress in tear microdesiccate analysis by combining various transmitted-light microscope techniques

  BF Ph1 Ph2 Ph3 DF
Zone I ++ ++ +
Zone I filaments + ++ ++ +
Bulky appearance of zone I ++ +
Transition band ++ +++ +++ +
Zone II-ferns + + ++ +++ ++
Zone III-ferns + ++ ++ +++ ++
  1. BF brightfield; Ph1 Phase 1 contrast; Ph2 Phase 2 contrast; Ph3 Phase 3 contrast; DF darkfield
  2. Visibility:– nil; + scarce; ++ intermediate; +++ high