[ULPIANUS libro uicensimo nono ad Sabinum. ] §8.2.15.prInter seruitutes ne luminibus officiatur et ne prospectui offendatur aliud et aliud obseruatur: quod in prospectu plus quis habet, ne quid ei officiatur ad gratiorem prospectum et liberum, in luminibus autem, non officere ne lumina cuiusquam obscuriora fiant.
[ULPIANUS in the twenty-ninth book On Sabinus.] Between the servitudes "that light be not obstructed" and "that prospect be not obstructed," different rules are observed: for in the case of prospect, a person has more, namely, that nothing obstruct his more pleasant and free prospect; whereas in the case of light, the rule is not to obstruct so that anyone's light becomes dimmer.
quodcumque igitur faciat ad luminis impedimentum, prohiberi potest, si seruitus debeatur, opusque ei nouum nuntiari potest, si modo sic faciat, ut lumini noceat.
Therefore, whatever acts to obstruct light can be prohibited, if the servitude is owed, and a notification of a new work can be served upon it, provided that it is done in such a way as to harm the light.