Interaction of Femtosecond Pulses with Transparent Media for Application of Corneal Microsurgery
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Femtosecond (10-15s) lasers are used for high precision microsurgery because energy deposition of ultrashort pulses occurs with minimal heat transfer and damages. Consequently, potential applications of femtosecond lasers to corneal surgery are very promising. The INRS Ti:Sapphire laser was used for investigation of the ablation threshold (which is the minimal energy per unit surface to create damage) of freshly enucleated pig eyes and hydrogel buttons. The laser pulse was focused using different lenses, with focal lengths from 125 mm to 30 mm, on the surface of the sample. A silicon photodiode with appropriate filters to cut-off the laser fundamental wavelength was placed in front of the sample to collect the integrated optical signal emitted from electron ionization and recombination in the plasma. For pulse duration of 200 fs, the ablation thresholds of three corneal layers, the endothelium, epithelium and stroma, were found to be nearly the same and increased with the pulse duration. The integrated optical signal was found to be strongly affected by the hydratation level during the experimentation; which infers that the ablation threshold change with corneal dehydratation. On another hand, for energy values in the same range but longer pulse duration (270 ps), small cavities were induced under the surface of hydrogel instead of the surface limited damage induced by 200 fs pulses. Results will be compared to theoretical calculation for light-cornea interaction using a model developed at INRS. These experiments constitute an initial step toward the development of a new type of high precision surgical tool for corneal microsurgery.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it