Long-term tamoxifen citrate use and potential ocular toxicity

Area of Science:

• Ophthalmology
• Oncology
• Pharmacology

Background:

• Tamoxifen citrate is a widely used medication for breast cancer treatment and prevention.
• Long-term ocular effects of tamoxifen therapy require thorough investigation.

Purpose of the Study:

• To assess the prevalence of visual function and ocular structure abnormalities in women using tamoxifen citrate long-term.
• To compare ocular findings between tamoxifen users and non-users.

Main Methods:

• A cross-sectional study involving 303 women with breast cancer undergoing tamoxifen therapy.
• Participants were categorized into never-treated, recently-off-tamoxifen, and continuously-treated groups.
• Evaluations included questionnaires, psychophysical testing, and clinical examinations of ocular structures.

Main Results:

• No vision-threatening ocular toxicity was observed in tamoxifen-treated women.
• Tamoxifen users showed no significant differences in visual acuity or daily vision activities compared to controls, except for color screening.
• Increased frequency of intraretinal crystals and posterior subcapsular opacities were noted in the tamoxifen group.

Conclusions:

• Tamoxifen therapy is not associated with severe ocular toxicity.
• Regular ophthalmic evaluations are recommended within the first year of tamoxifen initiation and periodically thereafter.
• Monitoring for specific ocular changes like crystals and posterior subcapsular opacities is advised.