https://hdl.handle.net/10481/5458 Mon, 13 Apr 2026 20:51:06 GMT 2026-04-13T20:51:06Z https://hdl.handle.net/10481/111792 Combined Occlusion Therapy and Home-Based Perceptual Learning in Children with Persistent Amblyopia: A Longitudinal Case Series Pérez Benito, Maria; Amigo Gamero, Raquel; Calderón González, Teresa; Cardona Pérez, Juan De La Cruz; Martín González, Santiago; Portela Camino, Juan A. Objectives: Persistent amblyopia often shows limited response to occlusion therapy once visual acuity improvement plateaus. This study evaluated the efficacy of a two-phase pro tocol combining occlusion therapy and home-based perceptual learning (PL) in children with persistent amblyopia, including those with congenital pathology. Methods: This lon gitudinal case series included 40 patients (mean age 9.4 ± 3.4 years). Phase I consisted of occlusion therapy until best-corrected visual acuity (BCVA) plateaued. Phase II combined continued occlusion with home-based PL training until BCVA in amblyopic eye reached 0.00 logMAR or treatment was discontinued. BCVA and stereoacuity (TNO test) were as sessed at baseline, after Phase I, after Phase II when applicable, and at a prospective eval uation visit. Treatment success was defined as a gain of ≥2 logMAR lines or a final BCVA ≤0.10 logMAR. Patients were stratified according to cumulative training exposure (<10 h vs. ≥10 h). Results: After Phase I, mean BCVA improved from 0.45 ± 0.23 to 0.26 ± 0.19 logMAR (p < 0.01). After Phase II, BCVA further improved to 0.13 ± 0.16 logMAR (p < 0.01). Stereoacuity showed a modest but significant improvement, from 928 ± 505 to 748 ± 558 arcsec (p = 0.01). Treatment success was achieved in 72% of patients completing ≥10 h of perceptual learning compared with 40% in those completing <10 h (RR = 1.94, 95% CI 1.01–3.73). Patients with non-pathological amblyopia achieved greater final BCVA than those with congenital pathology. Conclusions: The combination of occlusion therapy and home-based PL was associated with further improvement in visual acuity and modest gains in stereoacuity in children with persistent amblyopia. Greater cumulative training exposure was associated with higher treatment success, supporting PL as a clinically val uable adjunct to standard amblyopia management. https://hdl.handle.net/10481/111792 https://hdl.handle.net/10481/109677 Standard or local solar spectrum? Implications for solar technologies studies in the Atacama desert Marzo Rosa, Aitor; Ferrada, Pablo; Beiza, Felipe; Besson, Pierre; Alonso-Montesinos, Joaquín; Ballestrín, Jesús; Román, Roberto; Portillo, Carlos; Escobar, Rodrigo; Fuentealba, Edward https://hdl.handle.net/10481/109677 https://hdl.handle.net/10481/109675 Solar extinction measurement system based on digital cameras. Application to solar tower plants Ballestrín, Jesús; Monterreal, Rafael; Carra, María Elena; Fernández-Reche, Jesús; Polo, Jesús; Enrique, Raúl; Rodríguez, José; Casanova, Marina; Barbero, Francisco Javier; Alonso-Montesinos, Joaquín; López, Gabriel; Bosch, Juan Luís; Batlles, Francisco Javier; Marzo Rosa, Aitor https://hdl.handle.net/10481/109675 https://hdl.handle.net/10481/109654 The Influence of Projection Lamps on the Colors of Early Silent Cinema Films Vázquez, Daniel; Álvarez Fernández-Balbuena, Antonio; Hernández, Irene; del Egido, Marian; Uceda, Patricia; Muñoz, María; Rellán, Javier; Melgosa Latorre, Manuel Quantitative data on the colors of early film productions is very scarce but may be useful for preserving these cultural assets and for guiding modern digitization processes. We measured the spectral transmittance of 46 small areas in 13 frames of films from the 1910s and 1920s, which were colored using the same tinting process. From spectral measurements of the light source in an early carbon arc cinema projector, we computed CIELAB color coordinates for these areas and the results were compared with those from two more recent light sources: a Xenon lamp and an ultra-high performance (UHP) lamp. Average color inconstancy values for the 46 samples were 3.5, 7.9, and 7.0 CIELAB units for carbon-Xenon, carbon-UHP and Xenon-UHP changes, respectively, which are color differences above human visual thresholds for observers with normal color vision. Therefore, for accurate color specifications of such films, in addition to the spectral transmittances of frames, we must consider the spectral power distribution of projection lamps. Compared with a recent surface object-color gamut, the 46 samples were spread across a relatively wide region of color space, excluding CIELAB hue-angles in the range of 270–360 degrees. https://hdl.handle.net/10481/109654 https://hdl.handle.net/10481/109647 Testing colour-difference formulas from LMS colour spaces inspired in CIELAB Wang, L; Li, Changjun; Melgosa Latorre, Manuel; Xiao, Kaida; Gao, Cheng CIELAB was recommended by CIE in 1976 as an approximately uniform colour space and colour-difference formula based on CIE XYZ tristimulus values. In the current paper, first CIELAB is improved by keeping its structure and optimizing its four parameters in XYZ, LMS and XFYFZF spaces, resulting in modifications named MLAB(XYZ), MLAB(LMS) and MLAB(XFYFZF), respectively. After this, CIELAB and these three modifications were evaluated in XYZ, LMS and XFYFZF colour spaces, respectively. From the combined and corrected (COM-corrected) visual dataset employed after CIEDE2000 development (J. Opt. Soc. Am. A. 25, 1828-1834, 2008), using the Standardized Residual Sum of Squares (CIE 217:2016), we found that CIELAB and its modifications perform similarly in XYZ and XFYFZF spaces and perform worse in the LMS colour space. It was also found that the three modifications to CIELAB perform significantly better than CIELAB in predicting the COM-corrected dataset, but significantly worse than the CIEDE2000 colour-difference formula and CAM16-UCS space. The MLAB(XFYFZF) space can therefore be tested as an approximately uniform colour space and colour-difference formula, following research proposed by CIE Technical Committee 1-98. https://hdl.handle.net/10481/109647