During his eighteen (18) years of service with UPL, he boarded various foreign ocean-going vessels[4] while performing his duties and responsibilities that included cleaning chemical-spill-oil on deck, slat dislodging, and spraying naphtha chemical and washing dirt and rusts inside the tank.   Petitioners medical record shows that his illness started in May 1993 when he experienced episodes of bilateral blurring of vision. While in Singapore then, he consulted Dr. Richard F.T. Fan, an ophthalmic surgeon, and he was diagnosed to be suffering from advanced glaucoma.[5] His condition recurred even after his separation from service, prompting him to seek further eye consultations and treatments in the Philippines.[6] His eye disease was finally diagnosed as chronic open angle glaucoma.[7]   On account of his ailment, petitioner filed before the SSS a claim for compensation benefits under P.D. No. 626, as amended. The application, however, was denied on the ground that there is no causal relationship between the illness and his job as a seaman.[8] When his motion for reconsideration was also denied, petitioner elevated the case to the ECC which later on affirmed the assailed decision. The ECC ratiocinated, thus:   Following a careful review of the documents on record, the Commission is inclined to rule against the compensability of [petitioners] ailment. The present employees compensation program, which is embodied in P.D. 626, as amended, requires[,] and we quote, that:   For the sickness and the resulting disability or death to be compensable, the sickness must be the result of an occupational disease listed under Annex A of these Rules with the conditions set therein satisfied, otherwise, proof must be shown that the risk of contracting the disease is increased by the working conditions (Rule III, Section 1[b] of the Implementing Rules of P.D. 626, as amended)   Definitely, [petitioners] Chronic Open Angle Glaucoma is not an occupational disease under the law. Thus, he is required to show by substantial evidence that the nature of his job as a Seaman had increased the risk of

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