fˌæɡəsɪtˈoʊsɪs ʌv fˌoʊɾoʊɹᵻsˈɛptɚɹ ˈaʊɾɚ sˈɛɡmənt pˌiːˌoʊˈɛs mˈɛmbɹeɪnz: pˌiːˌoʊˈɛs ɑːɹ ɛkspˈoʊzd tə kˈɑːnstənt fˈoʊɾoʊˈɑːksɪdətˌɪv stɹˈɛs, ænd ðeɪ ɡˌoʊ θɹuː kˈɑːnstənt dᵻstɹˈʌkʃən baɪ ɪt.
Phagocytosis of photoreceptor outer segment (POS) membranes: POS are exposed to constant photo-oxidative stress, and they go through constant destruction by it.