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Original Research

Frequency Doubling Technology Visual Field Loss in Fabry Subjects Related to Retinal Ganglion Cell Function as Explored by ERG and OSOME

ORCID Icon, , &
Pages 1893-1908 | Published online: 09 Jun 2022

Figures & data

Figure 1 Typical corneal verticillata showing pigments and haze.

Figure 1 Typical corneal verticillata showing pigments and haze.

Figure 2 Bulbar conjunctival vessels tortuosities and micro-aneurysms.

Figure 2 Bulbar conjunctival vessels tortuosities and micro-aneurysms.

Figure 3 The same blood vessel tortuosities may be seen on the external upper lid.

Figure 3 The same blood vessel tortuosities may be seen on the external upper lid.

Figure 4 Arterioles and venules showing tortuosities.

Figure 4 Arterioles and venules showing tortuosities.

Figure 5 Typical Fabry posterior sub-capsular cataract.

Figure 5 Typical Fabry posterior sub-capsular cataract.

Table 1 Characteristics of the Study Population

Box 1 Description of the ERG System and Strategy Used

Table 2 Results from the Optic Nerve Head Scanning

Table 3 Visual Field Testing (SAP) Results

Table 4 FDT Results

Figure 6 (AD) Evolution of the visual field defects. (A) Patient A OD year 1- no defect; (B) patient A OD year 2- defect in 3 quadrants; (C) patient B OS year 1 - defect in 4 quadrants; (D) patient B OS year 2 – defect in 3/4 quadrants but more severe.

Figure 6 (A–D) Evolution of the visual field defects. (A) Patient A OD year 1- no defect; (B) patient A OD year 2- defect in 3 quadrants; (C) patient B OS year 1 - defect in 4 quadrants; (D) patient B OS year 2 – defect in 3/4 quadrants but more severe.

Table 5 Responses to a Flash, Under Photopic Conditions

Table 6 Amplitude of pnHR Vs Stimulus Intensity

Figure 7 Example of a typical graph showing the relationship between PSD and blood volume.

Figure 7 Example of a typical graph showing the relationship between PSD and blood volume.

Figure 8 Example of a typical graph showing the relationship between MD and blood volume.

Figure 8 Example of a typical graph showing the relationship between MD and blood volume.