Table 3 Tear Ferning Classification Criteria according to the Masmali tear ferning (TF) grading scale
Grade 0 | The phenomenon of crystallization is full, with no spaces or gaps between the ferns. |
Grade 1 | The density of the fern and branches is reduced with the appearance of small spaces and gaps between them. |
Grade 2 | The fern and branches are reduced and can become thick and large, with the presence of clear spaces and gaps. |
Grade 3 | The spaces and gaps are increased and very visible in grade 3 without formation of ferns, but with the presence of large crystals. |
Grade 4 | The phenomenon of crystallization in this pattern is totally absent. |