Frequency doubling technology perimetry in retinal diseases--preliminary report

Area of Science:

• Ophthalmology
• Visual Electrophysiology
• Retinal Diseases

Background:

• Frequency Doubling Technology (FDT) perimetry is recognized for its speed, simplicity, and high sensitivity/specificity in glaucoma diagnosis compared to conventional methods.
• The utility of FDT in various retinal diseases beyond glaucoma requires further investigation.

Purpose of the Study:

• To evaluate the functional role of Frequency Doubling Technology (FDT) perimetry in patients with diverse retinal diseases.
• To assess the correlation between FDT results and the extent of disease in specific retinal conditions.

Main Methods:

• FDT using the full-threshold C-20 mode was administered to 33 patients diagnosed with rhegmatogenous retinal detachment (RRD), age-related maculopathy (AMD), or central serous chorioretinopathy (CSCR).
• Retinal disease extent was quantified using a scoring system for fundus quadrants and the macular area.
• Spearman's rank correlation was employed to compare retinal scores with FDT total deviation plots.

Main Results:

• A statistically significant correlation was observed between FDT results and disease extent in the RRD group (R = 0.57, P = 0.01).
• No significant correlation was found between FDT results and disease extent in patients with macular diseases (AMD: R = 0.47, P = 0.12; CSCR: R = 0.32, P = 0.20).

Conclusions:

• Frequency Doubling Technology (FDT) perimetry may serve as a valuable and straightforward tool for the functional assessment of rhegmatogenous retinal detachment (RRD).
• The current scoring system for FDT is not suitable for evaluating macular diseases such as AMD and CSCR.