Spectrophotometric Analysis of Different Polymethyl Methacrylate Filters and their Importance in the Implantation of Corneal Rings

Abstract

Purpose

This study evaluated the luminous behavior applied to materials used in intraocular surgeries.

Methods

Discs of the different products were delivered in 19.00 mm × 3.00 mm. Each sample was fixed on support keeping it perpendicular to the spectrophotometer beam. Later, their analyses were carried out in the air/PMMA ratio. The graphs of individual profiles of the measurements along the length were constructed according to each of the filters from the spectrophotometric analysis. In addition, descriptive statistics of transmittance and absorbance for each wavelength presented were correlated for each filter.

Results

It is possible to observe that the minimum absorption measure was found in the Red Filter, especially in the blue and green light spectrum.

Conclusion

Using filters in PMMA materials appears to improve visual quality in corneal implants, especially the red filter, due to greater absorbance of light leading to fewer light scattering phenomena through corneal rings. However, further studies comparing the effects of different filters on Intracorneal rings should be carried out to elucidate this field of study.

Keywords:

• Filters
• corneal
• implantation
• materials
• ring

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

Data available on request from the authors