Filter Bars

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Bagolini Filter Bar
Code: SGR-951-N
The Bagolini Filter Bar is used to investigate the depth of suppression in patients with amblyopia up to the age of 7 years. This instrument consists of a series of red filters of increasing density from very pale to very dark. This decreases the ill..
£327.00

Neutral Density Bar
Code: SGR-950-N
This bar is an assembly of optical filters of progressive densities providing a graduated system of dissociation. This is very useful to reinforce weak fusional status and can be used to measure Afferent Pupillary Defects (APD), also termed ‘di..
£136.00

Overlay for Neutral Density Bar
Code: SGR-952-NO
This overlay filter is designed for use with the Neutral Density Filter bar (catalogue number SGR-950-N) and increases the density of all light levels by 1.8 log units.  ..
£30.00