Comparing Static Perimetry Protocols of Central Field Testing among Patients with Glaucoma

Area of Science:

• Ophthalmology
• Optometry
• Visual Sciences

Background:

• Glaucoma diagnosis relies on visual field testing to detect characteristic patterns of vision loss.
• Accurate and efficient visual field testing is crucial for early glaucoma detection and management.
• The Humphrey Field Analyzer (HFA) is a standard tool for visual field assessment.

Purpose of the Study:

• To compare the Humphrey Field Analyzer (HFA) 24-2C Faster with the 24-2 Swedish Interactive Thresholding Algorithm (SITA) Standard and 10-2 tests in glaucoma patients.
• To evaluate the detection of central visual field defects, global indices, and testing duration of the HFA 24-2C Faster.
• To determine the suitability of the HFA 24-2C Faster for initial glaucoma visual field evaluation.

Main Methods:

• Sixty eyes of 60 glaucoma patients with existing visual field defects were tested using the HFA 24-2C Faster and 10-2 algorithms.
• The number of central defective points, global indices (mean deviation, pattern standard deviation), and reliability indices were compared.
• Intraclass correlation coefficients were used to assess consistency between the different testing algorithms.

Main Results:

• The HFA 24-2C Faster detected more central defective points (5.5 on total deviation, 2 on pattern deviation) compared to the 24-2 SITA Standard.
• The 10-2 algorithm identified more defective points than the HFA 24-2C Faster.
• Excellent consistency was found between HFA 24-2C Faster and 24-2 SITA Standard (ICC > 0.93). Testing time was significantly reduced with the HFA 24-2C Faster.

Conclusions:

• The HFA 24-2C Faster is a viable option for initial visual field screening in glaucoma patients.
• This faster testing protocol provides an advantage by significantly reducing examination time.
• The HFA 24-2C Faster demonstrates good consistency with established visual field testing methods for glaucoma.