Welch Allyn Spot Vision Screener - User Manual

Spot
TM
Vision Screener
Quick Start Guide
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Charging the Vision Screener
1. Connect the provided DC cord set and power supply/
charger together.
2. Locate the DC power connector on
the Vision Screener and connect the
power supply/charger. The DC power
connector easily inserts
into the Vision Screener.
CAUTION Using force to
connect the power charger
can damage the device and
will void the warranty.
3. Plug the DC power cord into an available wall outlet to charge
the device.
Note: The device needs to be charged for 4 hours before use.
Powering on the Vision Screener
To turn the Vision Screener on, press and release the power
button located below the Welch Allyn logo (start-up process
takes approximately 30 seconds). Once powered on, the device
displays the Home Screen.
Controls, Display Window, and
Connections
1. Ambient light sensor 7. AC power connector
2. LCD screen 8. Power button
3. Neck strap mount 9. Wrist strap mount
4. USB port 10. Range finder
5. Battery charge green
LED indicator (Flashing)
or charged (Continuous)
11. Front glass
12. Speaker
6. Tripod mount
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Device Home Screen
1. Queue – View, select or search for queued subjects from a list
to begin the screening process.
2. History – View already screened subjects (completed records).
3. Tools – A variety of options to customize the vision screener.
4. The Start button allows you to:
• Enter subject information such as ID, First and Last
Name, Gender and Date of Birth (DOB)/Age (Required)
• Find queued subjects (exact match on the ID screen)
• Begin the screening process (Binocular and
Monocular available)
• Review and print screening results
5. Battery status –
• Battery Charging
• Battery charge status
6. Age Range – To begin instant screening, with no personal
subject data, select an age range of the subject from the Home
screen. You can enter subject data after the screening
if desired.
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Summary

Charging the Vision Screener

Device Home Screen

Queue Function

View, select or search for queued subjects to begin the screening process.

History Function

View already screened subjects (completed records).

Tools Function

Access various options to customize the vision screener.

Start Button Functions

Enter subject info, find queued subjects, begin screening, review results.

Battery Status Indicators

View battery charging and charge status indicators.

Age Range Selection

Select age range for instant screening or enter data later.

How to Screen a Subject

Lighting Prerequisites

Prepare lighting conditions for optimal subject screening.

Screening Process Steps

Step-by-step guide for performing a vision screening on a subject.

Viewing and Understanding Results

Wireless Network Configuration

Connecting to a Printer

Connect the vision screener to HP or generic PCL printers.

Troubleshooting

Limit Accommodation

Steps to reduce patient eye focus adjustment during screening.

Encourage Dilation

Methods to achieve pupil dilation for clearer scans.

System Restart and Freezing

System Freeze Troubleshooting

Procedure for hard reset if the device becomes unresponsive.

Printer Issues Troubleshooting

Steps to resolve problems with printer connectivity or jobs.

Wireless Issues Troubleshooting

Guide for resolving problems connecting to a wireless network.

System Messages

Reference for system messages and consulting device directions.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The Welch Allyn Spot™ Vision Screener is a portable, handheld device designed for rapid and accurate vision screening across a wide range of ages, from infants to adults. Its primary function is to detect common vision problems, such as refractive errors, that may lead to amblyopia (lazy eye) if left uncorrected. The device is engineered for ease of use, allowing caregivers to perform screenings quickly and efficiently, even without specialized ophthalmological training.

Function Description

The Spot Vision Screener utilizes advanced technology to objectively measure refractive errors and other vision parameters. It operates by emitting infrared light towards the subject's eyes and analyzing the reflected light to determine the eye's refractive state. This process is non-invasive and takes only a few seconds, making it ideal for screening young children or uncooperative subjects. The device can detect conditions such as myopia (nearsightedness), hyperopia (farsightedness), astigmatism, and anisometropia (unequal refractive power between the two eyes). It also provides measurements for pupillary distance and pupil size, which are important indicators of ocular health.

The screener is designed to provide immediate, easy-to-understand results. After a screening, the device displays a "Screening Complete" message if all measurements are within normal limits, or a "Complete Eye Exam Recommended" message if out-of-range measurements are detected. This clear indication helps caregivers determine whether a subject requires further evaluation by an eye care specialist. The device's ability to screen binocularly (both eyes simultaneously) and monocularly (one eye at a time) offers flexibility in different screening scenarios.

Usage Features

The Spot Vision Screener is designed for intuitive operation, starting with its charging and power-on process. To charge, the device connects to a wall outlet via a provided DC cord and power supply/charger, requiring approximately four hours for a full charge before initial use. Powering on involves a simple press and release of the power button, after which the Home Screen is displayed within about 30 seconds.

The Home Screen serves as the central hub for all screening activities. It features several key options:

• Queue: Allows users to view, select, or search for queued subjects to begin a screening. This is particularly useful in high-volume screening environments.
• History: Provides access to records of already screened subjects, enabling review of past results.
• Tools: Offers a variety of customization options for the vision screener, including settings for network configuration, printer connections, and result display preferences.
• Start Button: This initiates the screening process. Users can enter subject information such as ID, name, gender, and date of birth/age, or find queued subjects. For instant screening without personal data, users can select an age range directly from the Home Screen. The device supports age ranges from 6-12 months up to 20-100 years, ensuring applicability across diverse populations.

During screening, the device guides the user through the process. Proper lighting is crucial, with recommendations to turn off lights, close blinds, and avoid direct light into the patient's eyes from ambient sources, exterior light, or incandescent/halogen lights. Fluorescent light is noted as the best testing environment. To encourage dilation and limit accommodation (the eye's automatic focusing adjustment), subjects are advised to close their eyes for 10-15 seconds before screening. The screener should be held approximately three feet from the subject, on an even plane with their eyes, to ensure accurate capture and prevent the patient from looking upward. The device provides real-time feedback, such as a "Pupils too small" message if pupils are constricted or if something impedes the infrared light source.

Results are displayed clearly, with out-of-range measurements highlighted in red. The results screen provides detailed information, including pupillary distance, pupil size, and complete refraction data for both the right (OD) and left (OS) eyes. This includes spherical equivalent (SE), sphere (DS), cylinder (DC), and axis measurements. The device also indicates cylinder convention and alignment. Users can customize how results are viewed through the Tools menu, choosing between summary or detailed results, and opting to hide recommendations or screening results.

The device also supports wireless network configuration, allowing it to connect to available networks. This connectivity is essential for printing screening results. The vision screener is compatible with most network-capable Hewlett-Packard (HP) printers and includes generic PCL drivers for non-HP printers. Users can add new network printers, configure printer details, and print test pages. A printer icon in the menu bar indicates job processing and the number of jobs in the print queue.

Maintenance Features

The Spot Vision Screener is designed for reliability, but like any electronic device, it may require occasional troubleshooting or system maintenance.

• System Restart: In cases where the device needs a power cycle, users can press and hold the On/Off button until a confirmation screen appears, then select "Confirm" to power off. After waiting 30 seconds, pressing the Power button again will turn the device back on. Ensuring the device has power by plugging it in is important.
• System Freeze: If the vision screener becomes unresponsive, a hard system reset may be necessary. This involves pressing and holding the On/Off button until the screen goes black, then releasing it. After about one minute, the normal start-up process can be performed. It's noted that this procedure may cause some data loss, such as printer configuration or subject data.
• Printer Issues: Troubleshooting printer problems involves several steps:
  • Verifying the printer is on and has sufficient ink/toner.
  • Printing a test page directly from the printer.
  • Confirming the printer is on a local network by printing from a PC on the same network.
  • If all checks pass, a system restart is recommended.
  • If a print job is stuck in the queue, a "Reset" button is available to clear the job and reset the printer.
• Wireless Issues: For problems connecting to a wireless network:
  • Check the Wireless icon in the upper right corner; if it's red, power cycling the screener is advised.
  • Verify all network settings are correctly entered.
  • Try turning the screener off and back on.
  • Check the Home screen for the network name and IP address in the black bar.
  • If the connection doesn't automatically reconnect, users can go to Tools, Network, select "Security Type," reselect the correct type (e.g., WEP, WPA/2 PSK), and select "OK" to re-instate the network connection.

The device also provides system messages to guide users, and for comprehensive instructions, warnings, and cautions, users are directed to consult the detailed Directions for Use that shipped with the device. Technical support information is available via the Welch Allyn website.

Welch Allyn Spot Vision Screener Specifications