Forecasting of hydrophilic contact lens tolerance by means of tear ferning test

  title={Forecasting of hydrophilic contact lens tolerance by means of tear ferning test},
  author={L. Ravazzoni and Carlo Ghini and Angelo Macr{\`i} and Maurizio Rolando},
  journal={Graefe's Archive for Clinical and Experimental Ophthalmology},
Abstract · Background: The ability of the tear ferning test to predict future hydrophilic contact lens tolerance was studied. · Methods: The tear ferning test (TFT) was performed on one randomly chosen eye of each of the 116 subjects who came to our contact lens clinic for hydrophilic contact lens application. The TFT was performed at the time of enrollment (T0) and then 1 month (T1), 3 months (T2) and 6 months (T3) after contact lens fitting. The specificity and the sensitivity of the TFT in… 

Tear ferning in contact lens wearers

  • K. EvansR. NorthC. Purslow
  • Medicine
    Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians
  • 2009
In both CL and NCL subjects, TF displayed poor correlation with tear film stability tests and OCI scores, which could suggest similar aetiology (tear film hyperosmolarity) in each cohort.

Ocular Ferning Test – Effect of Temperature and Humidity on Tear Ferning Patterns

High humidity can modify and deteriorate the ferning patterns of tear fluid from subjects with normal tear function, and an rH not higher than 50% at a temperature range between 20 and 26°C produced ferning pattern without interstitial spaces which could be related to the best quality according to the system of Rolando.

Repeatability and Diurnal Variation of Tear Ferning Test

The results found no significant differences within the TF for tear samples collected at different times of the day, suggesting that there is little diurnal variation evident.

Efficacy of two-month treatment with Xiloial® eyedrops for discomfort from disposable soft contact lenses

A two-month treatment with Xiloial showed good tolerance and appeared to reduce ocular surface damage and symptoms of discomfort and the mean ± standard deviation of all variables improved as follows.

Establishment of a Tear Ferning Test Protocol in the Mouse Model

A TF test protocol for the mouse model was established that could be used for comparative analyses under various ocular surface disease conditions and displayed reproducibility and storage stability.

Zeta potential of tear samples: A tool to explore the effects of wear of contact lenses.

Clinical and Biochemical Tear Lipid Parameters in Contact Lens Wearers

Degraded lipids and a lower mole percentage of wax esters in the tear film may be associated with a lower NISDT and Lipid supplements may improve ocular comfort during lens wear by increasing NIS DT.

Development of a new grading scale for tear ferning.

The tear ferning test: a simple clinical technique to evaluate the ocular tear film

The tear ferning test is a laboratory test but it has the potential to be applied in the clinic setting to investigate the tear film in a simple way and is currently not widely used because of some limitations that need to be overcome.



Quantitative tear ferning Methodologic and experimental investigations

  • M. Norn
  • Engineering
    Acta ophthalmologica
  • 1988
Ferning is obstructed by ointment, fat emulsion dropped on the conjunctiva and mucous thread, but not by a glass slide rubbed with stearin, and no significant alteration was observed after instillation of water or stimulation of the tear secretion by nasal inhalation of NH4OH.

An interesting use of the study of tear ferning patterns in contactology.

  • O. KogbeS. Liotet
  • Medicine
    Ophthalmologica. Journal international d'ophtalmologie. International journal of ophthalmology. Zeitschrift fur Augenheilkunde
  • 1987
A study of tear ferning patterns in normal and keratoconjunctivitis sicca eyes led to the classification into 4 types by Rolando [1984], which can result in an appreciation of tear quality in contactology.

Ocular ferning test. A qualitative test for mucus deficiency.

Increased tear evaporation in eyes with keratoconjunctivitis sicca.

In 52 patients with KCS symptoms, either with or without tear volume reduction as measured by Schirmer's basic secretion test, a statistically significant increase in water evaporation rate from the tear film when compared with normal subjects is found.

The dry eye: its mechanisms and therapy, with evidence that contact lens is a cause.

  • R. Farris
  • Medicine
    The CLAO journal : official publication of the Contact Lens Association of Ophthalmologists, Inc
  • 1986

The effect of hyperosmolarity on tear mucus ferning.

Quantitative tear fern

  • Acta Ophthalmol
  • 1988

Quantitative tear fern - ing . Clinical investigations

  • Acta Ophthalmol
  • 1994

Tear mucus ferning test in normal and keratoconjunctivitis sicca eyes

  • Chibret Int J Ophthalmol
  • 1984