UTF-5470A Optical trial frame, PD 54–70 mm
A compact optical trial frame with a central PD dial from 54 to 70 mm, a Ø38 mm aperture for full-size trial lenses, four lens cells per eye, black axis scales, an adjustable nose pad and temples from 140 to 170 mm. Supplied boxed.
Delivery, packing and documents
What the UTF-5470A adjusts
PD dial
One central dial sets the PD from 54 to 70 mm, on a 1 mm scale.
Four lens cells per eye
Three cells in front and one behind, with 360° rotation of the lens in the inner ring.
Axis scales
Black scales marked every 5°, increasing anticlockwise: 165°–0°–180°–25° on both sides.
Adjustable nose pad
The nose pad extends by 2 mm, widens by 2 mm and tilts from 0° to 180°.
Adjustable temples
Temple length from 140 to 170 mm.
Full-size aperture
A Ø38 mm effective aperture for full-aperture trial lenses.
A closer look at the UTF-5470A
PD dial, 54–70 mm
Set the PD on the central dial, marked 54 to 70 mm, with black axis scales on both lens cells.
Four lens cells per eye
Three cells in front and one behind, with a Ø38 mm aperture.
Adjustable temples
Temple length from 140 to 170 mm, with an adjustable nose pad.
UTF-5470A in figures
Published specifications. Anything not listed here is confirmed in writing on your quotation, never estimated.
Weight, dimensions and the optical-to-geometric center tolerance are confirmed in writing on your quotation.
UTF-5470A
- PD range
- 54–70 mm; 1 mm scale
- Axis scale
- 165°–0°–180°–25° both sides, anticlockwise, every 5°
- Effective aperture
- Ø38 mm
- Lens cells per eye
- 4 (3 front, 1 back)
- Lens rotation
- 360°
- Lens axis nonparallelism
- ≤ 2.5°
- Lens displacement from frame center
- ≤ 0.3 mm
- Nose pad
- Length +2 mm, width +2 mm, angle 0°–180°
- Temple length
- 140–170 mm
Choosing and using a trial frame
How it works
A trial frame holds trial lenses in front of the patient’s eyes at a controlled distance and angle. Set the PD so each lens center sits in front of the pupil, set the height, and adjust the nose pad and temples so the frame sits level.
A trial frame suits patients who find a phoropter difficult: young children, older and low-vision patients, wheelchair users, and high prescriptions, because you can see the patient and set the vertex distance yourself. Put the strongest sphere in the back cell, closest to the eye, and record the vertex distance; for powers of ±5.00 D and above it should go on the prescription.
Trial frames are also used to let a patient try a new prescription in real conditions, walking or reading, before the glasses are made.
Check before you order
- PD range against your patients: 54 to 70 mm covers most adults.
- Whether you need a monocular PD setting; this frame sets the total PD on one dial.
- Aperture: Ø38 mm takes full-aperture trial lenses.
- Temple length: 140 to 170 mm.
Good practice
- Set the PD on the central dial before placing lenses.
- Adjust the nose pad so the frame sits level.
- Put the strongest sphere in the back cell, then set the cylinder axis on the scale.
- Record the vertex distance for prescriptions of ±5.00 D and above.
Care and maintenance
- Wipe the frame after each patient.
- Store the frame in its box.
Background sources: Trial frame refraction: more than just “1 or 2?” (Cybersight, Orbis) · Essential course in dispensing, part 14 (Optician)
Often ordered with the UTF-5470A
UTF-5470A questions
Who is the UTF-5470A for?
Adults with a PD from 54 to 70 mm. For children or very wide faces, the UTF-4880A and UTF-T4880R go from 48 to 80 mm.
Can I set each eye separately?
No. The central dial sets the total PD. For monocular PD, choose the UTF-4880A or UTF-T4880R.
Which trial lenses fit?
Trial lenses with Ø38 mm rims; the effective aperture is Ø38 mm.
How many lenses can I stack?
Four per eye: three in front and one behind.