Description
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Product description
- The Handheld Bagolini Striated Lens Set with Penlight is a specialized orthoptic diagnostic instrument used to assess binocular sensory status, retinal correspondence, and suppression in patients with ocular misalignment or binocular vision disorders. Unlike highly dissociative tests, Bagolini lenses allow testing under near-natural binocular viewing conditions, making them valuable for identifying whether the patient exhibits normal retinal correspondence (NRC), anomalous retinal correspondence (ARC), or suppression.
- Each lens contains very fine parallel striations that transform a point light source into a straight luminous streak perpendicular to the direction of the striations. When the patient views the included penlight through the lenses, each eye perceives a streak of light. The pattern and intersection of these streaks reveal how the patient’s visual system combines input from both eyes.
- What it evaluates: Retinal correspondence (NRC vs ARC), suppression, binocular sensory fusion, and alignment perception
- How it works: Patient views a penlight fixation target through the striated lenses → each eye perceives a streak of light → clinician observes the patient’s description of the streak pattern to determine binocular sensory status
- Included components: Handheld Bagolini striated lens frame, precision striated lenses, diagnostic penlight, and lens cleaning cloth
- Typical use steps: Position lenses before patient’s eyes → shine penlight at fixation distance → ask patient to describe the perceived streak pattern → interpret streak intersection or displacement to evaluate binocular status
- Clinical advantages: Provides natural binocular viewing conditions, minimal dissociation compared to other tests, quick assessment of suppression and retinal correspondence
- Who it suits: Optometrists, ophthalmologists, orthoptists, and vision therapy specialists performing binocular vision assessments in strabismus or suppression cases
- Care: Clean lenses with a soft optical cloth and lens-safe solution; avoid scratching the striated surface; store the set safely to maintain lens clarity and accurate streak formation.
| Topic | Details |
| Purpose / Target Users | The Handheld Bagolini Striated Lens Set is a diagnostic tool used in binocular vision assessment to evaluate retinal correspondence, suppression, and binocular sensory status in patients with eye alignment disorders. The finely striated lenses create light streaks when viewing a point light source, allowing clinicians to assess normal retinal correspondence (NRC), anomalous retinal correspondence (ARC), or suppression. The tool is primarily used by optometrists, ophthalmologists, and orthoptists during binocular vision examinations. |
| Optotypes / Symbols | The Bagolini lenses do not contain optotypes such as letters or numbers. Instead, the finely striated lens surfaces produce linear light streaks when the patient views a point light source, enabling clinicians to analyze binocular visual responses. |
| Scaling / Spacing | The lenses contain very fine parallel striations etched or molded into the lens surface. These striations produce light streaks perpendicular to the orientation of the grooves. The exact spacing of the striations is optimized to create clear streaks while maintaining minimal disruption of natural binocular viewing conditions. |
| Range of Acuity / Line Sizes | Not applicable. The Bagolini Striated Lens test is not designed for measuring visual acuity or line sizes. It is used for qualitative evaluation of binocular sensory status and retinal correspondence. |
| Testing Distance | The Bagolini test can be performed at both near and distance fixation, depending on clinical requirements. It is commonly conducted using a penlight or fixation light source positioned in front of the patient during binocular vision assessment. |
| Physical Size & Portability | The handheld frame set typically measures approximately 6.5 × 2 × 0.25 inches, making it compact and portable. The design allows clinicians to easily position the lenses in front of the patient’s eyes during examination. |
| Mounting / Display Features | The lenses are mounted in handheld frames with temples, allowing the clinician to position them comfortably in front of the patient’s eyes. The device is used in conjunction with a penlight or fixation light, rather than mounted on a chart or stand. |
| Included Accessories / Extras | The standard set typically includes the handheld Bagolini striated lens frame with lenses, a penlight for light fixation testing, and a cleaning cloth. Some penlights may also include a pupil gauge or pupilometer scale for quick pupil size estimation. |
| Durability / Material Qualities | The lenses are typically manufactured from precision optical plastic with finely molded striations, designed to maintain clear streak formation. Frames are generally made from durable plastic or lightweight materials suitable for repeated clinical use. |
| Usability / Marker of Quality | A high-quality Bagolini lens set provides clear and well-defined light streaks with minimal optical distortion, allowing accurate evaluation of retinal correspondence. Quality indicators include precise striation patterns, comfortable handheld frames, reliable penlight illumination, and durable lens construction, making it a standard diagnostic tool in binocular vision assessment. |
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