Soft contact lens contamination by Alternaria alternata

Area of Science:

• Ophthalmology
• Mycology
• Contact Lens Care

Background:

• Alternaria alternata is a common fungus found in the environment.
• While known to cause human infections, it has not been previously reported as a contact lens contaminant.
• Two cases of contact lens contamination by A. alternata were observed.

Observation:

• Two patients presented with mild ocular irritation attributed to contact lens contamination.
• The contaminating fungus was identified as Alternaria alternata.
• Neither patient developed a fungal keratitis or other intraocular infection.

Findings:

• Alternaria alternata, previously unreported as a contact lens contaminant, was identified in two separate cases.
• The sequential presentation of these cases suggests potential underreporting of A. alternata as a contact lens contaminant.
• Mild ocular irritation was the sole clinical manifestation in both instances.

Implications:

• This finding underscores the importance of rigorous contact lens cleaning and disinfection protocols for daily wear lenses.
• Patients using extended-wear contact lenses must seek immediate medical evaluation for any ocular symptoms to prevent serious complications.
• Awareness among eye care professionals regarding A. alternata as a potential contact lens contaminant is warranted.