1. A03: Lightweight Fogging Opens the Era of "Silent Intervention"

The A03 children's corrective glasses (smart fogging model) is SPAEXI's starting product in the children's vision protection category, priced at 499 RMB. It was the first to turn "behavioral correction" from verbal reminders by parents into automatic device intervention: when a child has poor posture or gets too close to reading material, the lenses produce automatic fogging as visual feedback to remind the child to adjust posture.

The A03's industry significance lies in:

• Proving with a 32.6g ultra-light body that children's smart glasses can achieve "barely noticeable wear";

• Using fogging instead of sound or vibration to create a silent alert method suitable for classrooms and self-study;

• Using a 499 RMB accessible price to lower market education costs and allow more families to try smart vision protection products for the first time.

But the A03's limitations are equally clear: fogging alerts have weak feedback under bright outdoor light, and the monitoring dimension focuses mainly on posture, with insufficient coverage of reading distance and eye-use duration.

2. A05: Clip-On Attachment Covers "Children Already Wearing Glasses"

The A05 children's corrective glasses (clip-on model), priced at 599 RMB, is SPAEXI's precise market fill for a specific group. It uses a design that can be attached to ordinary glasses, clipping directly onto existing frames, and uses laser ranging to monitor reading distance and a 3-axis gyroscope to monitor head tilt angle.

The A05's evolution is reflected in:

• Form innovation: No need to change existing glasses, lowering the usage threshold for children who already wear prescription glasses;

• Sensor upgrade: Introduces laser ranging, which is more accurate than the A03's infrared or ultrasonic solution for close-range distance measurement;

• Dual-dimension monitoring: Expands from single posture correction to distance + angle, closer to the core behavioral indicators of myopia prevention.

However, the A05 is essentially still an "external accessory." Its wearing stability and sensor calibration are significantly affected by the base frame, and it cannot cover children who have not yet started wearing glasses, creating a ceiling in product completeness.

3. A07: Standalone Vibration Completes the "Three-Dimensional Behavioral Monitoring" Loop

The A07 children's corrective glasses (vibration model) is the current culmination of the A-series. It abandons the clip-on structure and returns to a standalone frame, weighing about 35g with TR90/PC materials. It integrates high-precision distance sensors, angle sensors, and an ambient light sensor, and uses motor vibration for alerts. Functionally, it achieves three major monitoring capabilities:

1. Distance monitoring: Vibrates when reading distance is less than 30 cm;

2. Angle monitoring: Vibrates when the head tilts more than 20° left or right;

3. Bright light detection: Records outdoor bright light activity time, helping parents assess myopia prevention effectiveness.

The A07's leap lies in:

• From visual feedback to tactile feedback: Vibration alerts are equally reliable outdoors and during movement;

• From two dimensions to three dimensions: Adding bright light detection upgrades "passive correction" to "behavioral recording";

• No phone, no app, just power on and use: The 110mAh battery provides 200 hours of standby, with magnetic charging taking about 1.5 hours for a full charge;

• Bluetooth 5.1 reserves connectivity capability, compatible with iOS, Android, and HarmonyOS.

At this point, the A07 is no longer a simple posture reminder tool, but an all-day children's eye-use behavior management terminal that provides parents with quantifiable outdoor time data.

4. The Three-Generation Evolution Logic: What SPAEXI Did Right

From A03 to A07, SPAEXI's evolution is not blind feature stacking, but follows a clear product logic:

Key evolution points:

1. Alert method from visual to tactile: Solves the problem of insufficient fogging visibility under bright outdoor light;

2. Monitoring dimensions from single to multi-dimensional: Gradually covers the core behavioral risks of myopia formation (distance, posture, outdoor time);

3. Product form from standalone to clip-on and back to standalone: The first-generation standalone model educated the market, the second-generation clip-on accurately covered existing users, and the third-generation return to standalone achieves functional completeness and wearing stability;

4. Usage threshold continuously lowered: The A07 achieves no screen, no app, and power-on-and-use, leaving technical complexity to itself and simplicity to children and parents.

5. Industry Observation: Children's Smart Glasses Enter a New Stage of "Behavioral Datafication"

Children's myopia prevention has now risen to a national health strategy, but traditional methods still focus mainly on "reminders" and lack data recording and feedback. The evolution of SPAEXI's A-series actually reflects the industry's transformation from "correction tools" to "health management terminals":

• A03 era: Proved that children's smart glasses can become daily wearables;

• A05 era: Explored segmented user groups and sensor precision;

• A07 era: Used bright light detection to enter outdoor time management, giving the product data value.

In the future, with the integration of AI and sensors, children's vision protection glasses are expected to further connect to family health data platforms and link with parent apps and school vision screening systems. With self-developed and self-manufactured products, full-chain quality control, and OEM/ODM capabilities, SPAEXI, building on the technical accumulation of three generations of products, already has the foundation to upgrade from "selling hardware" to "selling children's eye health management solutions."