Thornstein fixed caliper 3 1/8 aphakic: 4.0mm, phakic: 5.0mm

Fixed-Dimension Caliper for Consistent Clinical Measurement

The Thornstein fixed caliper is a 3 1/8-inch measuring instrument designed for repeatable dimensional assessment in professional dental and ophthalmic workflows. Its fixed configuration provides clearly defined reference points for checking or comparing measurements without requiring an adjustable setting during use. The instrument identifies separate 4.0 mm aphakic and 5.0 mm phakic dimensions, helping users select the reference appropriate to the task at hand. Its compact length supports controlled handling and convenient access around the working field, while the straightforward design keeps measurement steps focused and easy to integrate into established procedures.

Use Cases

• Use as a fixed reference caliper when dimensional assessment is required in dental instrument workflows.
• Apply the 4.0 mm aphakic reference for tasks requiring the named aphakic measurement.
• Apply the 5.0 mm phakic reference for tasks requiring the named phakic measurement.
• Support measurement and comparison tasks in ophthalmic settings where a fixed caliper is appropriate.
• Use the 3 1/8-inch instrument length for controlled handling during routine professional measurement work.

Specifications

Care & Handling

• Clean the caliper according to facility protocols and the applicable instructions for use.
• Inspect the fixed reference points and overall instrument condition before and after handling.
• Handle the caliper carefully to preserve its defined measuring geometry.
• Store it in a clean, protected location to reduce the risk of damage or contamination.

Specifications

General use; follow facility protocols.