Subfoveal choroidal thickness and cataract: the Beijing Eye Study 2011

Area of Science:

• Ophthalmology
• Retinal Imaging
• Choroidal Imaging

Background:

• Subfoveal choroidal thickness (SFCT) is a key indicator of ocular health.
• Cataracts, particularly nuclear, posterior subcapsular, and cortical types, are prevalent in aging populations.
• The relationship between SFCT and different cataract types requires further investigation.

Purpose of the Study:

• To investigate the association between subfoveal choroidal thickness (SFCT) and the presence and degree of various cataract types.
• To determine if SFCT is independently associated with nuclear, posterior subcapsular, or cortical cataracts.

Main Methods:

• Utilized data from the Beijing Eye Study 2011, including 2548 participants aged 50-93 years.
• Employed enhanced depth imaging spectral domain optical coherence tomography for SFCT measurements.
• Categorized cataracts using the Age-Related Eye Disease Study system based on lens photographs.

Main Results:

• No significant association was found between SFCT and the presence or degree of nuclear cataracts after adjusting for multiple factors.
• A significant association was observed between thinner SFCT and a lower degree of posterior subcapsular cataract (P=0.027) and cortical cataract (P=0.028).
• Binary regression analysis indicated that the presence of subcapsular cataract was associated with older age and thinner SFCT (P=0.006).

Conclusions:

• While nuclear cataracts are not linked to abnormal SFCT, a thinner SFCT is significantly associated with posterior subcapsular and cortical cataracts.
• This association between thin SFCT and subcapsular/cortical cataracts may hold clinical significance due to the known link between thin SFCT and reduced visual acuity.