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Bagolini Striated Glasses Test
The Bagolini striated glasses test, or BSGT, is a subjective clinical test to detect the presence or extent of binocular functions and is generally performed by an optometrist or orthoptist or ophthalmologist (medical/surgical eye doctor). It is mainly used in strabismus clinics. Through this test, suppression, microtropia, diplopia and manifest deviations can be noted. However this test should always be used in conjunction with other clinical tests, such as Worth 4 dot test, Cover test, Prism cover test and Maddox rod to come to a diagnosis.
To perform the test you will need
Alternatively, trial frames and lenses or a lorgnette can be used. In some cases, the use of prisms is necessary to measure a deviation and test for the presence of binocular functions.
Apart from testing binocular functions, Bagolini striated glasses can measure cyclotropia . The principle of the test is similar to that of double Maddox rod test. The glasses are placed in the trial frames with the striations vertical, giving rise to two horizontal line images when viewing a spotlight. If the patient has a vertical deviation, the lines will be seen one above the other. If there is little or no vertical separation, vertical prism can be used to separate the lines. The patient is asked if one or both lines are tilted. The lines can be straightened subjectively by rotating the glasses in the trial frame and the degree of cyclotropia recorded.
The BSGT is used for patients with strabismus to test for suppression, normal retinal correspondence or abnormal retinal correspondence, particularly in cases of manifest strabismus.
The Bagolini Striated Glasses Test is the test most likely to allow the demonstration of fusion in patients who fuse intermittently. Harmonious anomalous retinal correspondence is found more frequently when using Bagolini Striated Glasses Test than with the Worth 4 dot test or the synoptophore.
The BSGT is performed under normal lighting conditions. The Bagolini glasses can either be used in trial frames or are set up in reversible lorgnette frames which are placed over the patients glasses who wear refractive correction. The examiner shines a torch light, directing it towards the centre bridge of the Bagolini glasses i.e. the patients nose (light is at patients eye level) from distance (6 m) or near (33 cm). The patient can also be tested in alternate positions of gaze (upgaze or downgaze). The test is usually performed at near.
The number and type of questions asked are contingent on whether the patient has binocularity present and the consequent responses to the testing questions. The patient is firstly asked about the number of lights visible and the position and number of lines seen.
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Bagolini Striated Glasses Test AI simulator
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Bagolini Striated Glasses Test
The Bagolini striated glasses test, or BSGT, is a subjective clinical test to detect the presence or extent of binocular functions and is generally performed by an optometrist or orthoptist or ophthalmologist (medical/surgical eye doctor). It is mainly used in strabismus clinics. Through this test, suppression, microtropia, diplopia and manifest deviations can be noted. However this test should always be used in conjunction with other clinical tests, such as Worth 4 dot test, Cover test, Prism cover test and Maddox rod to come to a diagnosis.
To perform the test you will need
Alternatively, trial frames and lenses or a lorgnette can be used. In some cases, the use of prisms is necessary to measure a deviation and test for the presence of binocular functions.
Apart from testing binocular functions, Bagolini striated glasses can measure cyclotropia . The principle of the test is similar to that of double Maddox rod test. The glasses are placed in the trial frames with the striations vertical, giving rise to two horizontal line images when viewing a spotlight. If the patient has a vertical deviation, the lines will be seen one above the other. If there is little or no vertical separation, vertical prism can be used to separate the lines. The patient is asked if one or both lines are tilted. The lines can be straightened subjectively by rotating the glasses in the trial frame and the degree of cyclotropia recorded.
The BSGT is used for patients with strabismus to test for suppression, normal retinal correspondence or abnormal retinal correspondence, particularly in cases of manifest strabismus.
The Bagolini Striated Glasses Test is the test most likely to allow the demonstration of fusion in patients who fuse intermittently. Harmonious anomalous retinal correspondence is found more frequently when using Bagolini Striated Glasses Test than with the Worth 4 dot test or the synoptophore.
The BSGT is performed under normal lighting conditions. The Bagolini glasses can either be used in trial frames or are set up in reversible lorgnette frames which are placed over the patients glasses who wear refractive correction. The examiner shines a torch light, directing it towards the centre bridge of the Bagolini glasses i.e. the patients nose (light is at patients eye level) from distance (6 m) or near (33 cm). The patient can also be tested in alternate positions of gaze (upgaze or downgaze). The test is usually performed at near.
The number and type of questions asked are contingent on whether the patient has binocularity present and the consequent responses to the testing questions. The patient is firstly asked about the number of lights visible and the position and number of lines seen.